You fall in love and are in a relationship with Itoshi Rin's brother, Itoshi Sae, who never even treats you well and often ignores you as if he isn't in a relationship with you and like people say 'love makes you blind' and that's what Itoshi Rin hates because he kept feelings first but why his older brother got you

"I could be a better boyfriend than him."

Rin says to you when he sees you complaining to him again because Sae ignored you as usual. and this time Rin will make you his