The story picks up with Riku waking up to find himself in a compromising position, being tightly embraced by his classmate Futaba in what he realizes is his own room. Futaba, still half-asleep, explains she likely wandered in after a midnight bathroom trip. Riku, flustered by the physical closeness and the impending need to prepare breakfast and get to school, tries to extricate himself. His efforts are interrupted by the arrival of Futaba's two older sisters, Ichie and Aya, who freeze in shock at the scene. Riku is mortified, fearing the worst for his reputation. The sisters pull Futaba off him, urging them both to get ready for school.
The narrative then flashes back to the previous day, revealing the cause of Riku's predicament: his apartment building burned down. He lost nearly all his possessions, leaving him homeless. The next day at school, Riku is despondent, having spent the night in a net cafe and with no immediate place to stay, as his father, who is abroad, is arranging a new home but it won't be ready for another day. He contemplates sleeping in a park. It's then that he witnesses the arrival of the renowned Tennozu sisters: Ichie, a prodigy pianist with a serene demeanor; Aya, a spirited track and field ace; and Futaba, the genius professional gamer. Riku, feeling the vast chasm between his own misfortune and their seemingly perfect lives, resigns himself to his bleak situation.
Later that afternoon, Riku is indeed in a park, attempting to make a bench his bed for the night. He is interrupted by Futaba, who surprisingly asks if he would like to stay at her house. Despite his initial hesitation and attempts to refuse, Futaba's gentle persistence and the direness of his situation lead him to accept. He is awestruck by the sheer size of the Tennozu residence. Inside, he encounters Ichie and Aya in a state of disarray, arguing while wearing minimal clothing, shattering his image of them as perfect geniuses. Futaba explains they are simply getting ready for the day.
The situation escalates when Ichie, the eldest, expresses her strong reservations about a boy staying in a house inhabited only by women. However, Aya points out that their father's condition for them living alone was to maintain a "genius-worthy" lifestyle, and their current messy state is far from it. Riku seizes this opportunity and proposes a deal: he will clean their incredibly messy house in exchange for a place to stay for the night. The sisters, realizing the monumental task of cleaning it themselves and facing a deadline for their father's report, reluctantly agree.
Riku dedicates three hours to thoroughly cleaning the house, transforming it into a pristine state. He then prepares a delicious Chinese-style dinner for everyone. While waiting for the sisters to emerge from their rooms, he learns from Futaba about their peculiar diets: she subsists on complete nutrition bars, and Ichie eats only instant meals due to lack of time. Riku, inspired by the waste of good food, decides to cook for them.
During dinner, Ichie and Aya are initially hesitant but are won over by Riku's cooking. Futaba, who had been half-asleep, is revived by his food and even shares a rare, genuine smile. Riku is deeply moved by this. After dinner, Riku goes to report the completion of his cleaning to Ichie. He finds her playing the piano, her performance of "Tempest" deeply affecting him. Ichie is initially annoyed by his intrusion but is touched when Riku expresses genuine admiration for her dedication and effort, not just her talent. She agrees to let him stay, but on the condition that he sleeps on the living room sofa.
Later that night, Riku is unable to sleep due to the surreal situation. He is then joined by Aya, who claims to be hungry after her workout. Riku makes her a simple, healthy meal, which she devours with delight, praising his cooking. He also gently wipes some sauce from her mouth, causing her to blush intensely. He then prepares breakfast for the next morning.
The following morning, Riku prepares breakfast. Ichie and Aya emerge, and Riku continues to impress them with his thoughtfulness, preparing Ichie's requested fried eggs and gently drying Aya's hair. Futaba eventually joins them, still groggy, and Riku feeds her, which helps her wake up. The sisters seem to envy the attention Riku is giving Futaba. The chapter concludes with the lively breakfast scene, highlighting the growing, albeit awkward, dynamic between Riku and the Tennozu sisters.
