Hayase Ikoi

Makio Kōdai is a shy 35-year-old woman. She works as a novelist. One day, her sibling and her sibling's married partner die in a car accident. Makio Kōdai attends their funeral and meets her 15-year-old niece Asa Takumi, who is now left alone due to her parents’ death. The other relatives at the funeral speak insensitive words around Asa Takumi. Makio Kōdai gets furious at them and decides to take in her niece. Makio Kōdai, who has problems having relationships with other people, and Asa Takumi now begin to live together.

During the summer vacation period, temporary teacher Honoka Kimijima is in charge of a supplementary class. One day, a female student suddenly jumps off from the school rooftop and dies in front of Honoka Kimijima. Then she notices a mystery student who is not supposed to be there.

High school sophomores Ryo, Hikaru, and Chika are living a seemingly peaceful high school life while harboring hidden emotions. One day, Hikaru and Chika find 8mm film in an old warehouse inside the school. A stunning girl in the film captures Hikaru’s attention, while Ryo worries about Hikaru, and Chika keeps an eye on the beautiful girl, whose gaze seems to pass by.

Takagi loves playing good-natured pranks on her classmate Nishikata. But try as he might, he can never prank her back — she's just too clever!