10 years after the worst birthday - Jun and Karin regained their peaceful daily lives. Karin was about to turn 28. In order to make it the best birthday, the two of them decide to go on a hot spring trip. But soon, a seemingly perfect trip turns into a nightmare, and everything is made more difficult by the fact that it was supposed to end with a proposal.
Ninako Kinoshita is a high school freshman with no experience in love. When she meets Ren Ichinose—a handsome boy who’s popular with all of their female classmates — on a train during their commute home, she starts encountering him more regularly and gradually develops feelings for him. However, Ren already has an older girlfriend. As the relationship of these two is explored, several other people in their lives must deal with their own feelings of unrequited love.
