I change just to have my revenge with that hateful b*tch!

Odagiri Rin is in love with a girl.

He did everything to make that girl like him.

But that girl did not cared even ones for him and even used him as she pleased until Rin confessed his love to her but never got an answer.

One day he caught that girl talking with her friends.

"Rin? I'm not planning on dating him but the only reason why I didn't reject him is because I can use him that way, it's more convenient and I already have a boyfriend so I'll just dump him if I don't have any used with him, haha."

At that time he felt something awaken within him...

That is the feeling of....anger and yearning for revenge...

(She used me, played with my feelings, and then she will just throw me in the end without any compensation to what she did. I want revenge, I'll make her heart mine and then make her feel regret!)