Katagiri Kyosuke left his hometown to live alone in Tokyo in order to go to college.In his hometown, he is in a long-distance relationship with his girlfriend Sachichi Koyamauchi, whom he has been dating since middle school, and leads a stable college life.
On the other hand, Saichi writes a letter to Kyousuke, looking forward to the day when Kyousuke replies.Almost another year has passed like this.
One day, Kyousuke sent a lost item he picked up by chance to his neighbor's room.What came out was Kunikida Murasaki, a mature woman who had just taken a shower and was full of charm.Kyosuke didn't know where to look, so he left the room.
Since that day, Purano had greeted her several times, but she met her where her husband was and learned about the marriage.Although Kyousuke had always been disgusted by what he said, Murasaki's words made Kyousuke take the first step...