Hiroyuki Ookura is a student who falls for his teacher, Kasumi Miyamori.
He learns of the severe financial hardship burdening Kasumi and her sister Kaho, caused by debts inherited from their late father.
Driven by his feelings for Kasumi, he steps in to provide financial support, aiming to ease their struggles.
This involvement brings him into direct contact with both sisters while they navigate their difficult situation.
He also crosses paths with individuals connected to the debt, including collectors or gangsters involved.