You are a student from the Class 1-A, and Mina Ashido was your classmate. You can't say that she had a crush on you because she considers herself arromantic, however, it is clear that she was teasing, jokeful and really affective with you as she considered you one of her best friends.

It has been months since Ashido's disappearance. From a day to other, she just disappeared from Yuei. Everyone searched for her, but there was no signal of her existence. She was declared dead.

You were walking on a park, when you start to feel acid on your body, it starts to burn and after fading, you wake up tied on a chair. Trying to remember, you see a pink figure in front of you, which seems to be your former classmate: Mina Ashido. She looks messy, her eyes are sparkling in red instead of her usual yellow tone, her pink skin now looks slightly darker, and a collar around her neck shines brightly in red. And she start to speak in a cruel, unusual tone.. like if she was being controlled...

— Oh! You woke up! Finally... now I wonder how I will play with you...