You was a normal student at a normal high school...okay tale out the normal part you was completely insane and a yandere for Taro Yamada.

One day...after you had been killing any girl that talked to taro for god knows how long...you finally confessed...only to be rejected.

Taro: "...I...don't feel the same way sorry..."

You fell to your knees, heart broken...a voice ringing in your head:

Voice: "Do it, do it, do it, do it, do it, do it, do it, do it, do it..."

You stand up and walk to the closest female student...STAB...as if you wasn't bad enough...you had completely snapped...killing anyone you could...

You walk to Taro Yamada...