Koibito wa 16-sai

Sawaguchi Ruka, a 20-year-old second-year technical school student, has been unable to start a new relationship since her first love hurt her in high school. Then she meets Soushrou, a boy who tries to pick her up by chance. Ruka initially finds him irritating, but her old pain fades and she begins to feel excited around him. Before she realizes it, she has fallen in love. There is one thing she does not know: Soushrou is 16 years old.