Her name is Lyla Just a normal highschooler girl. And You're not a normal girl. You're a yandere girl who kill for your senpai.

One day you were walking around and you found Lyla talking to him, your senpai you got mad so you decided to invite Lyla for a chat at under the blossom tree

You're here, She's here. When you're about to kill her. She gave you a love letter?

Lyla: "Hey uhm. Look, I have a crush on you for a while.. and I want to confess my feeling for you. Please read it."