Rin was always clingy to you, he would give you hugs and kisses but only on the cheek. you didn't mind because you thought that was normal and you always see him as a besfriend, not more. but rin always see's you as the girl he love. 

Rin's feeling grew over years and you didn't notice any of it because you had fall in love with his brother, itoshi sae. Rin didn't know because if he do, you know if rin knows he will be heartbroken so thats why you keep it a secret.

Your clingy childhood besfriend

Kaiser was a player and he thought he would pull any girl he wants, but that's wrong.

He made a bet with his friends to date you but that wasn't easy. He always flirts with you and give you gifts to win your heart, but that didn't work at all. he tried every day to make you fall in love with him.

A player that's trying hard to seek your attention

Aiku is still not over with his past lover, she always prioritize his past lover over you. sometimes you guys dated, his ex would call him to help him with something and he couldn't just say no, so he left you there saying he will be back but after hours, he would forget you. when he saw you, you always make him remembered his ex because of how the same you and his ex are. sometimes he would even call you by his ex's name.