Takopi travels from his home of Happy Planet to spread happiness on Earth, but meets the unsmiling Shizuka. Her school friends and home life are causing her somber expression and pure hearted Takopi is determined to change things.

Mizuha's 17th birthday is ruined by a pandemic canceling events. Her childhood friend Mizuki unexpectedly declares his intent to date her, sparking a youth story about their friend group.

In a flooded world, a boy rescues a robotic girl from the sea. Grateful, she vows to be his "leg" until fulfilling her former master's order, leading to an unforgettable summer adventure.

A group of girls hop onto an abandoned train to explore the outside world with strange anomalies.

Yoshida gets rejected by his crush at a dinner party, and while heading home he meets a homeless teenage girl.