Osananajimi ni Kareshi ga Dekita Hanashi

"I have a boyfriend."

Michiko Goto's daily life changed drastically when her childhood friend Yuma Tomura, who was quite popular for his cheerful personality and handsome appearance, suddenly confessed he is going out with another boy. He told her that the other person is the student council president, Kyoya Otani, aka the abusive prince, who was also popular amongst the girls. Even though they aren't actually love rivals, Otani would still pick on Michiko. When Yuma learned of this, and... A coming-of-age story about love, friendship, and battles over an important "friend"!

(Source: B's Garden, translated)