One day, a high school boy, Ninomiya Shungo, is ordered by Ryoko, his elder sister, to live with a beautiful girl, Tsukimura Mayu, in the same house together to cure her androphobia. As a cure for androphobia, they force Shungo to do various things like taking a bath together, or sleeping on the same bed. After Hojo Reika moves in to keep an eye on this "training" between Mayu and Shungo, the house has become quite lively. But is this seemingly random situation between Shungo and the two girls truly an accident or is there more to it...
The class is at Kyoto on a field trip, the boys try to get into the girl's room but are hunted down by the various faculty members. After being taunted by Tasuku, Shungo tries to force his way in to see Mayu, only to be intercepted by Irori.
Reika is introduced and gets worked up when Mayu unknowingly makes fun of her. Reika challenges Mayu to a contest for Shungo, only to lose and be blackmailed into becoming his maid.
Shungo, Mayu and Reika are attacked by soldiers and are held captive in the house. Shungo fights back but is beaten up after being knocked out by a mysterious woman in a Tiki mask. Reika exploits Mayu's bad luck to trigger the various traps in the forest, spreading chaos among the enemy. She uses this as a diversion to free Shungo, who then faces off against the mysterious woman.Watch Now:Amazon
The crew go to the beach for a 'vacation', where Mayu starts getting closer to Shungo as Reika continues to try to upstage her. After witnessing Shungo inviting Mayu to watch the stars together, Reika wanders off in a depression. Shungo runs off to find her, only to meet her inner self instead. Things end with the appearance of a mysterious group of soldiers.
Shungo, Mayu and Reika spend the last day in Kyoto having fun together, like they did back when they were children. Tasuku tries to break them up by using his family's ninja-clan to eliminate Mayu, only to be stopped by Irori. Irori confesses her love to Tasuku and tells him she has only loved him, not Shungo. Mayu leaves the house and Shungo is under arrest.
Reika's inner self has taken over and uses her corporate muscle to separate Shungo from Ryōko in an attempt to restore his memory. After reminiscing with Reika, he's drugged and held captive (plus nearly raped) in order to keep him from Mayu. Irori and Tasuku then combine forces with Shungo's other friends in an attempt to rescue him.Watch Now:Amazon
Mayu attempts to help Reika with the housework, only to find a hidden passage instead. They get trapped within the passages for most of the day, only to be abducted by Ryōko for slacking off when they finally escape.
Ryōko orders Shungo to make some ramen for her. He and Mayu spend hours trying to create the perfect ramen, only to realize that Ryōko will settle for a simple cup ramen.