Mysterious Girlfriend X: Season 1

A strange new transfer student named Mikoto Urabe is instantly labelled as a weirdo due to her odd sleeping patterns and a strange outburst of laughter during class. When Akira Tsubaki wakes up Urabe at the end of a school day, he finds her face enchanting and ends up sampling some of her drool. After having a dream about Urabe that he can not seem to get out of his head, Tsubaki suddenly comes down with fever. Urabe goes to Tsubaki's house and gives him more of her drool which cures his fever,

Tsubaki decides to ask his friend, Kouhei Ueno, what he could do to advance his relationship with Urabe, though none of his advice seem to work on Urabe. When asked if they really are in a relationship or not, Urabe takes Tsubaki to an abandoned house. She tells Tsubaki to close his eyes and then she undresses, and then feeds Tsubaki her drool, explaining that their drool is a special bond that allows them to know what they are feeling. The next day, after Tsubaki has a strange dream involving U

Tsubaki spots Kouhei kissing Ayuko Oka, who Kouhei explains is his girlfriend, whom he's been secretly dating for a while. When Tsubaki expresses his desire to kiss Urabe, she gives him a testtube of her drool, telling him to drink it before he goes to bed. That night he has a dream where he is accidentally kissed by Urabe, feeling disappointed that she is not putting her feelings into it. The next day, Tsubaki comes to realise they should only kiss when they come to understand each other's feel

Ayuko decides to have her lunch next to Urabe, much to everyone's surprise. As Urabe gets a scrape during PE the next day, Ayuko takes her to the nurse's office to treat it. After sharing a drink with her, Ayuko discovers she suddenly has the same injury as Urabe. They soon deduce that Urabe's drool can also transfer injuries, showing Ayuko has a similar connection to her as Tsubaki does. Ayuko mentions how she became fascinated by Urabe after seeing her with Tsubaki, but Mikoto rejects her offe

After failing to see Urabe in a swimsuit during swim class, Tsubaki sees an image of her in a swimsuit while tasting her sweat. As summer vacation arrives and the two continue their drool swapping tradition, Tsubaki manages to build up the courage to ask Urabe on a date to the beach. A week passes and Tsubaki and a tanned Urabe head to the beach where they eat yakisoba and swim in the ocean. Upon spotting a tanline from Mikoto's pair of scissors, Tsubaki gets a nosebleed which Urabe later experi

While shopping for clothes, Tsubaki is met by Ayuko who talks to him about using first names with her boyfriend, Kouhei. Ayuko deduces that Urabe and Tsubaki do not use each others' first names via an abridged drool swapping with Tsubaki. She then accosts Urabe similarly and talks to her about first names briefly before Urabe excuses herself. At the park Tsubaki preys upon a sleeping Urabe by whispering her first name "Mikoto" to her. Tsubaki has another weird dream again and blurts out that he

After showing impressive display on the track, Urabe is asked to participate in a relay race for the sports festival, although she rejects the idea of joining the track team as it means she would not be able to walk home with Tsubaki. As the students switch to their winter uniforms, Tsubaki comes down with a cold. Having heard from Ayuko about how she dressed up in a bikini to help Kouhei get over a cold, Urabe secretly wears a bikini under her coat and gives Tsubaki some of her drool, which hel

Tsubaki has a dream where he got to squeeze Urabe's breast and can not get the sensation out of his head. Taking a stroll, he decides to go in the direction Urabe usually takes after school and comes up to an apartment block, which turns out to be where Urabe lives. Urabe invites Tsubaki into her apartment for a drink, where his imagination starts to get the better of him. After catching Mikoto as she trips after being spooked by some lightning, Tsubaki almost reaches for her breast but Urabe st

Noticing Urabe with a serious case of bedhead, Ayuko fixes her up with a new hairstyle. Urabe soon gets a lot of attention for her new hairstyle, which makes Tsubaki a bit jealous. As they go home, Tsubaki convinces Urabe to go back to her old hairstyle and messes up her hair on her request. The next day, as Ayuko calls her out on it, Urabe shows her the feeling of having her hair messed up, which she comes to enjoy. Meanwhile, as Tsubaki gets frustrated when one of the male students starts sell

Tsubaki runs into Aika who, having just been dumped by her boyfriend, reveals how she knew of Akira's feelings for her when he lies about not having a girlfriend. Aika gives Tsubaki the opportunity to try some of her drool, but he backs out realising it could damage his bond with Urabe, bringing to light that he does have a girlfriend. The next day, Aika decides to approach Urabe, inviting her to her school's culture festival on Sunday with the news that Tsubaki might be there. Later that night,

As Ayuko goes to the festival with Kouhei, she spots Tsubaki with Aika and decides to follow them. As Tsubaki tries to hold off the advances of Aika, Urabe appears in a box robot, suggesting they do a blind taste test of each of their drool to see which Tsubaki prefers. Akira instantly gets a nosebleed from Urabe's drool, due to the fact that she was naked inside her costume. Aika gets naked and attempts to give Tsubaki her drool, but she stops when she starts crying, making it clear that her ad

As Tsubaki is a little bashful around Urabe after having seen her naked, she requests to try his drool to experience how flustered he is. The next day, when Urabe uses her scissors against Tsubaki for attempting to hug her, she is shocked when she sees she had cut his forehead a little. As Urabe takes Tsubaki to her home to get his injury treated, she finds her scissors have become less accurate, which she believes to be caused by a strange dream she had after trying Tsubaki's drool. As Urabe gi

While out shopping, Urabe meets up with Tsubaki's sister, Youko, who takes her to a coffee shop, where she talks about past love crushes and asks about having a boyfriend. She mentions that she promised her deceased mother that she will take care of Tsubaki until he finishes his studies, and so does not have time for romances. Later on, Urabe asks Tsubaki to go to his mother's grave next Sunday and pay their respects. Urabe meets with Tsubaki and he's surprised to see her very formally dressed.