Ryoushin no Shakkin wo Katagawari Shite Morau Jouken wa Nihonichi Kawaii Joshikousei to Issho ni Kurasu Koto Deshita.

両親の借金を肩代わりしてもらう条件は日本一可愛い女子高生と一緒に暮らすことでした。

The main character, Yoshizumi Yuya, was being pressured into paying off the debt left by his parents who had fled abroad. It was his classmate, Hitotsuba Kaede, chosen as the cutest schoolgirl in Japan, who saved him from this crisis of life and death. However, there was a catch. The condition required to fulfill in return for taking over his debt was — “In return for the loan, you have – to live with me.”