Yamaha Shuuyuu wanted to confess his feelings for a girl he had feelings for at a school-sponsored overnight stay event, and to have a relationship between a man and a woman so that he could graduate from being a virgin.

However, things change when he meets the proprietress of the ryokan where he is staying, a beautiful mature woman named Arakawa Sayako.
Shuuyuu becomes aware of her as a woman for one reason or another.

He puts aside his one-sided love for the girl he wanted to confess to, and began to seek out Sayako.

"I want the proprietress to take my virginity, if it's with this kind of woman, I'll do what it takes..."

[From official site]