Watashi tte Uzai? Kimoi? Mendoukusai?

Natsune was dumped by her beloved ex-boyfriend, Tsubasa, for being too attached to him. Since then, she's decided to stay out of other people's lives and is enjoying a smooth relationship with her current boyfriend, Haruto. But something happens that threatens to shake up her peaceful days...!? (Source: Shogakukan, translated)