Osomatsu-kun: Season 1

The gaudy and untruthful Iyami comes to town, fashioning himself a salesman. After a botched robbery at the Matsuno house, he inadvertently becomes victim to teeth-regrowing medicine.

After harassing Dayon the fortune-teller, Iyami awaits three bad things to befall him that day, as per Dayon's prediction.

Iyami runs a shady clinic, but is pushed into failure by Dekapan's much more ethical office. To get revenge, him and Chibita cook up a scheme involving a transformation potion.

Chibita is training to become Prima Donna in Iyami's ballet studio's big show. When one thing leads to another and he's ousted from his role by Osomatsu, Chibita throws away his heart (literally) and causes mischief for the big recital.

Dekapan visits the sextuplets with his daughter -- not a human, but a pig. Osomatsu and Choromatsu cook up a scheme to trick Chibita, who has fallen in love with her not realizing what she truly is.

After dining and dashing for the umpteenth time, Iyami plans a scheme to fake his death and use the grievance money to skip town.

Chibita finds an abandoned baby, but runs into financial difficulties alongside the discovery that the mother wants her baby back.

On his way to becoming a first-grader, Chibita is caught between the expectations of being a good boy or being a troublemaker. With the help of Iyami's newly-developed personality-switching hat, he keeps a relatively clean appearance, but trouble ensues once he takes it off.

Iyami and Chibita sell used junk, but when they buy a wooden cabinet from the Matsunos that's worth a fortune, a battle ensues for who gets to claim the cash.

A candle-watching shinigami comes to town, and Iyami enlists his help in culling Osomatsu, who has recently come down with a life-threatening illness.

Iyami and Chibita, prison inmates, make a grand escape from their sentence, but only one problem is in their way, aside from the police on their tail: they're chained together at the waist.

Iyami, an amateur author who lives in poverty, strikes it rich when he sends in manuscripts that expose the many strange things about the people in town.

Lord Chibita, along with second-in-command Iyami, set up their Edo period-style headquarters in town, with the young Lord falling head-over-heels for Totoko.

Osomatsu and Choromatsu get kidnapped and replaced by aliens in a plot to take over the world, and it's up to the family to find out who the real kids are.

After Iyami stops Osomatsu from being hit by a car, he mooches off the Matsunos' generosity under the overabused pretense that he was a hero to their son.

Chibita, along with his scientist uncle, hatch a plan to shrink the sextuplets to flea-size so that he's no longer shorter and can pick on them for a change.

After getting framed for one of Iyami's tricks, Hatabou tries to stand up for himself with the help of shrine god Dekapan's courage-fortified water.

In a retelling of the O. Henry tale "A Retrieved Reformation", Chibita, a safecracker recently released from a three-year-sentence, vows to never crack a safe again. His promise is tested, however, in a dangerous situation where his skills are needed most.

Dekapan invents a mysterious liquid that causes anyone doused with it and who bumps heads to switch minds, leading to all sorts of chaos for the neighbors and their plans.

Iyami and Chibita mix up two fake watermelons: one full of valuables to give to the yakuza, and the other a bomb to give to the Matsunos as revenge for the destruction of Chibita's mosquito colony.

Paperboy Chibita makes friends with a notorious thieving cat, but trouble arises when the kitty must learn to be on the straight-and-narrow for his new human pal's health.

In this retelling of "Shane", Chibita, a wandering gunslinger in the Wild West, must protect the Dekapan Ranch from the marauding Matsunoki family and their nefarious benefactor, Iyami.

The ultra-rich Iyami's diamond dentures go missing, and it's up to Detective Hatabou to find the lost jewels and the culprit behind the thieving.

Totoko becomes infected with personality-altering bacteria after Iyami sneezes on her, leading Osomatsu and Choromatsu, along with Dekapan, to find out the secret to Iyami's nastiness by taking a "Fantastic Voyage"-style trip inside his body.

After Iyami steals all of an oden vendor's stock and pins it on oden-loving Chibita, the tortured boy sets his aim on the sextuplets and Iyami in a slasher-style game of revenge.

Because of their lower income and not enough family time, the Matsunos try to convince their tobacco-addicted patriarch to quit smoking. But when the simple act of stopping isn't enough, they enlist the help of Iyami and Chibita and their barbarous anti-smoking program.

Dekapan and Hatabou, two farmers on an island, make offerings to a stone god, and are shunned for being hard workers by the rest of the islanders. When a message from the god comes through to Hatabou to build a boat, the lazy villagers laugh it off. But could such a thing be true?

The brothers, Chibita, and Totoko go camping in the sticks, and run afoul of lecherous ascetic Iyami who will stop at nothing to bite Totoko's rear end.

Iyami, who starts an insurance company with the intention of frauding his unlucky customers out of their money, has his scheme put to the test when he bargains the Matsunos a new home if a typhoon hits Tokyo.

Chibita, having been picked on by the sextuplets one too many times, learns ninjutsu from Dekapan up in the mountains. But when Iyami wants in, as well as Dekapan finding out that Chibita plans on using his skills for revenge, a battle unfolds to decide who becomes the new disciple.