Misuzu Kanno, who was dumped by her boyfriend of five years is sexually frustrated, so looks for new encounters on dating apps. There she talks with a college gymnast, eight years her junior, and decides to meet. When she arrives at the rendezvous point, she finds that the boy she was talking with has brought a friend... Misuzu's disappointed at first, until a sweet proposal that the three of them hang out shakes things up!

(Source: MangaPlaza)