From Operation Boredom:

High school Student Kinugawa Kenichi is one of the members of the class committee and also the boyfriend of the super cute Ooumi Chiyako. However, one day a new student, Kuwabatake Aya, transfers to their school and demands that Kenichi be her boyfriend...?! Who exactly is this girl, and how does she know Kenichi?

Rewritten from a new author's perspective, the love story between three people.

Based on a light novel series