A high school student, Shuuyu Asai, who believes that "life is all about compromise" and pretends to be something he's not, has an unrequited crush on his best friend since childhood, the most beautiful girl in school, Unane Naraoka. One day, while talking with Nona Kusunoki, a sub-heroine classmate who keeps to herself in the classroom, a casual joke leads to a relationship. "...That's what I said, and I'm sticking to it." They each wanted a boyfriend and girlfriend, so they compromised with each other and became lovers?! They decided on the rules of their relationship, and began to exchange messages throughout the night, discovering the cute side of each other during study sessions and dates at home. The lover's life that started from a compromise turned out to be surprisingly fun!?