Michi, a 26-year-old high school math teacher, tentatively accepts her boyfriend's proposal of marriage, uncertain of her love for him, but feeling pressure from her father and society to do what is expected of her.
Hikaru is a 17-year-old boy frustrated by his home life with his single mother. After being expelled from many high schools for bad behaviour, he enters Michi's class as a new transfer student.
As their relationship grows,
