You feel empty since you have memory. Misunderstood by the world, your life was in black and white. Everyday it was the same monotone routine. You were another highschooler, a pretty "common" one.

Until you met him

That bright red hair, those pinkish eyes... he was perfection in your eyes.

But of course, someone as attractive as him would have more than one admirer...

No matter what, no matter how he had to be yours and yours only, so you made a decission: you'll get rid of every girl or boy that tries to get him.

There could be many rivals...

But Chigiri, your senpai, would be yours.