An energetic girl named Manatsu Natsuumi moves to Aozora City from Minamino Island to live with her mother, who works at the city's aquarium. Meanwhile, in the kingdom of Grand Ocean, a mermaid named Laura is tasked with finding humans who can open her assigned compacts to fight back against the Witch of Delays. Following the Mermaid Queen's orders, Laura heads off to Aozora City. Meanwhile, Manatsu arrives at the city, reunites with her mother and goes sightseeing. While taking a break, Laura a
While Laura intends to find more humans who can open her three remaining pacts, Manatsu prepares for her first day at Aozora Middle School. In her class, she recognizes a girl who she saw as she explored the city. The two become friends and discuss the school clubs they intend to join. Manatsu learns that her new friend, Sango Suzumura, desires to join the Cosmetics Club and runs a cosmetic shop alongside her mother, Miyuki Suzumura. However, Laura and Manatsu begin fighting among themselves, wi
Manatsu heads out on a weekend trip around Aozora City with some of her classmates, including Sango. The group meets at the city's shopping mall, where Manatsu is fascinated by the merchandise sold and Sango gives her purchased ice cream to a younger girl. The group then heads off to the aquarium, where Sango is separated from them while trying to return a lost wallet. Sango then tries to search for her friends, only to cross paths with Laura. The next day, Sango confides in Manatsu that she doe
Manatsu and Sango discuss on what clubs to join, during which Laura suggests making one themselves. As the two do research for their own club at the school's library, they encounter a stoic bespectacled girl named Minori Ichinose, who does not believe in the existence of mermaids despite liking mermaid stories. Deciding to find out more about that girl, Sango and Manatsu discover that she is a top student in school. However, when they try to compliment her on a story she wrote, Minori, believing
Manatsu meets a third-year student named Asuka Takizawa, and she and her friends decide to try recruiting her to become the fourth Pretty Cure because of her physical strength. However, Asuka is not interested, much to their chagrin. Meanwhile, Sango and Manatsu struggle to get their club started since there are very few clubrooms left. Asuka arrives to help them, though she does not intend to join their club. Later that day, Minori, Manatsu, Asuka, and Sango clean up a packed room to use for th
While the Witch of Delays and Butler discuss their plans and the Pretty Cure's interference, Manatsu and her friends discuss their club activities. Manatsu decides to try everything and approaches the president of Aozora Middle School's student council, Yuriko Shiratori, to initiate her club. However, she is rejected, and so they and Laura try out many ideas for their club, but are not satisfied with them. As they worry about the imminent club application deadline, they encounter a quartet of al
While jogging at the beach, Manatsu and her friends spot a seal, which Laura recognizes as the Mermaid Queen's pet Kururun. They examine the seal, with Laura misinterpreting its desires and Minori deducing that the seal was hungry. Minori also guesses that Kururun headed to the city from Grand Ocean to make a delivery for Laura, but was swept away by an ocean current. As such, they and Laura search for Kururun's package, with Minori finding it hanging on a tree branch because someone else found
The group sits together for bento lunches, during which Manatsu samples her friends’ ingredients. Asuka then mentions how her family helps one another with the chores, inspiring Manatsu to make a bento meal inspired by Kururun. As such, Asuka leads them in making the meal, with Laura assisting them with cooking. Elsewhere, Chongire summons a Yareneeda to terrorize a mobile food stall and its surrounding area. They are alerted to the attack and transform to fight the Yaraneeda, but are hungry fro
The Tropical Club makes preparations for Aozora Middle School when it is selected to be a film shooting location. Manatsu and her friends meet an actress named Yuna, who is insecure about her role and will have her makeup covered by Sango’s mother. As such, they train Yuna for her role while Sango is tasked with dressing up as a mascot for Miyuki's beauty parlor. Later, Manatsu’s friends recount how Manatsu influenced them and Yuna takes over Sango’s task once she wears out. However, Numeri arri
Manatsu's friends postpone their club activities to study, with Manatsu revealing she is not good at it. Manatsu tries studying on her own, but finds herself struggling to do so. As such, her friends teach her how to study properly. At that moment, Chongire arrives and summons a stronger Yaraneeda variant called a Zenzen Yaraneeda to attack the school's yard. They transform to fight the Yaraneeda, but it overpowers Manatsu and saps her Motivation Power. Laura's Mermaid Aqua Pot is also knocked a
Manatsu and her friends discuss activities they can participate with the other school clubs, with Minori suggesting sand art at the beach. As such, they hold a sand art contest involving several people in their school and participate in it as well. Over the course of the contest, Manatsu and her friends bond over making their own sand art. However, a heavy downpour occurs on the second day of the contest. Taking an idea from Laura as she looks through her photographs, Manatsu uses a parachute to
Manatsu and her friends are discussing their next club activity when the head of the school's disciplinary committee, Masami Kakuta, searches the room because of rumors of mermaid sightings in the school. Upon learning of the search, Asuka confronts the disciplinary committee over the matter, and they mention a rule allowing them to confiscate suspicious items to maintain order in the school. The next day, rumors of a mermaid around and in school run rampant while Yuriko turns down Asuka's compl
When the school's public announcement mentions rumors of a mermaid, Manatsu and her friends discuss folklore concerning mermaids, with Laura stating their singing talents. Later on, they meet members of the broadcasting club and offer to help him. On the day of the broadcast, one of the hosts is unable to join the others, forcing Manatsu and her friends to host the broadcast instead. They end up struggling to carry on the show, but Laura salvages the situation by pretending to be an interviewee.
The Tropical Club is told of a teaching experience at a preschool, which they are interested in. At the preschool, Manatsu and her friends play and learn together with its pupils, during which Sango and Laura come across an introvert boy, Wataru and a girl, Ruri, both of whom are interested in bugs. At that moment, Elda summons a Zenzen Yaraneeda to attack the preschool, forcing them to evacuate the students and transform to fight the Yaraneeda. Despite their best efforts, the Yaraneeda tries to
As the Tropical Club make preparations to cheer on the school's softball team, Minori and Laura accidentally get sucked into the Aqua Pot. When the two emerge, they discover that they have swapped bodies, though their friends only notice the change when they head out to greet them. Meanwhile, Minori and Laura discover each others' experiences as a mermaid and a human respectively. When their friends discover their switch, everyone discusses the situation, with Minori bringing Laura home with her
As Manatsu and her friends go on a mountain hike, the Witch and Butler discuss the current situation and Laura, owing to the lack of Motivation Power being gathered because of her ability to reclaim it. Meanwhile, the Tropical Club discuss more activities they can participate in over the summer vacation, and end up discovering Laura is absent. As such, they all search for her, with Minori finding Laura at the school's library reading The Little Mermaid. Later that day, Manatsu encourages Laura a
Picking up from the last episode, while Cure Summer and the other Cures search for Laura, the Witch warns Laura to not interfere with her efforts before sending her generals to steal more Motivation Power. As such, the Cures are forced to surface to fight two Zenzen Yaraneedas summoned by Chongire and Numeri. Meanwhile, Laura locates Kururun and tasks her with stealing the basement key to escape, but is caught by the Witch and Butler while trying to reclaim the Mermaid Aqua Pot. While Laura evad
Laura begins her first day in Aozora Middle School, where she finds herself enjoying some areas while struggling with other areas. Later on, Laura vents her frustration over struggling in some school subjects when Eiko Mizushima, the president of the Swim Club, invites her to her club, which Laura happily accepts. As Laura prepares to swim, Numeri, having been chosen by Butler to attack, summons a Zenzen Yaraneeda to attack the school's swimming pool, forcing Manatsu and her friends to transform
Manatsu and her friends discuss their school's newspaper requesting articles, with Minori bringing up ghost stories to put in and everyone decides to investigate ghost stories. As such, they head to an abandoned mansion on a mountain behind their school, where Minori explains more about the building and a doll located in it. When everyone tries to escape from an imminent accident, Manatsu ends up stuck in the mansion. She talks with the doll, who asks her to bring her food everyday. Manatsu does
Manatsu returns to the clubroom after finding her lost wallet and discovers that the premium tropical melon bread she won in a lucky draw has gone missing. As such, she decides to investigate who took the bread. During the investigation, Kururun is seemingly found innocent of the crime, but Laura is accused of the theft. Asumi, Sango, and Minori also state their last known activities and locations but everyone struggles to solve the case as discord grows between them. Meanwhile, Chongire, having
Manatsu and her friends decide to go on a camping trip to Minamino Island over their school's summer break. The girls gather at Manatsu's house, where they discuss activities over the course of the camp, with Manatsu mentioning a cave said to hide treasure and her mother, Aoi, suggesting they can relax at the beach. Following her mother's idea, Manatsu decides to show her friends the island's secret beach. The next day, Manatsu and her friends assemble to head off to their destination, but Chong
While the Tropical Club continue their camp, the Witch creates a new orb to summon a new kind of Yaraneeda. The group heads to Manatsu's secret beach before heading to a senior named Tomi, who recalls seeing a forest mermaid that allegedly hid the treasure in the island's cave. With that, they head off to the cave to find the treasure, but run into Numeri and are separated from Laura. The remaining members of the group venture deeper into the cave and encounter Numeri again, who summons a Zettai
As the Tropical Club enters their last day of camp, they try out many island activities while Manatsu prepares everyone for Minamino Island's festival. Meanwhile, Elda is tasked with retrieving a cup filled with Motivation Power from the caves. As such, she reluctantly heads off to accomplish the task after being promised vacation as a reward. On the evening of the festival, the group participates in writing their wishes on a stone and throwing it into the sea. However, Laura refuses to tell her
The Tropical Club attempts to hang a banner, only for it to fly into Yuriko Shiratori's interview. Angered by the incident, Yuriko decides to suspend the Tropical Club when the six girls receive an invitation to a gameshow. As such, both parties decide to settle the club suspension as they compete in the show. On the day of the show, the Tropical Club, the school's student council, and other teams participate in games, but then Numeri arrives and summons a Zettai Yaraneeda to interrupt the games
Homeroom teacher Saki Sakuragawa informs Manatsu's class of next week's class observation day. Later, Manatsu and her friends discuss with her about the observation, with Saki revealing her ageing father will also participate in it, with Minori deducing he wants her to run his family orchard. However, Saki is torn between her familial duties and her desire to teach. Later that day, Saki's father arrives at school for a tour but runs into issues along the way. The next day, Saki tries to impress
The group meets Shiori Nakagawa, who is trying to start an astronomy club and knows of a meteor shower that occurs every 50 years. Having gained interest in watching the meteor shower, the Tropical Club and Saki plan and advertise a night where anyone in school who is interested can watch the meteor shower. Amidst the duties, Minori mentions the weather forecast stating the night would be cloudy, which would obstruct the view. On the night of the meteor shower, Asuka's father leads some men in a
Manatsu and her friends plan a trip to the city's aquarium to see a new dolphin attraction. On the day of the trip, the dolphin attraction's wait time is too long, forcing them to look at other aquatic displays to pass the time. Despite the plan to wait for the crowds to thin, the dolphin attraction is still too long. Meanwhile, Manatsu and the others notice that the people visiting the aquarium have become lethargic. Deciding to investigate the matter, they book a night tour to allow Laura to s
Amidst anticipation for Aozora School's Cultural Festival, the Tropical Club decides to hold a makeup class, when Laura notices Minori distancing herself from the others. On the day of the festival, as everyone is setting up, Laura investigates Minori and asks some of her old friends about her. While the club mans their booth and help others out with theirs, Chongire heads to the festival to steal Motivation Power from the visitors, but ends up accidentally getting involved in a squid stall befo
As the agitated Witch makes a red orb which Butler uses on a body of water, Manatsu and Laura dream of a legendary Pretty Cure. As they begin their day, they are suddenly confronted by four Yaraneedas wrecking havoc around the city. They all transform to fight the Yaraneedas, but struggle against their sheer numbers. Amidst the chaos, Manatsu rescues Kururun from a Yaraneeda, but is defeated, drained of her Motivation Power, and engulfed by the Yaraneeda. Kururun hurries to the other four Cures
An election for a new president of the school council is held at the school, due to the previous president, Yuriko, retiring. This excites Laura, and she declares she wants to become the new school council president. As she signs up to become a candidate, she becomes competitive with Masami, who also signs up. Meanwhile, Butler and the rest of the group discuss the team obtaining the Land Heart Kuru Ring. While Laura and the girls start a campaign, everyone supports Rika Ichijo instead, making L