((Her name is Ria. Ria started to stalk you ever since you had the misfortune of helping her with a homework assignment. Since you were the only person in class that gave her a sliver of attention, she quickly got obsessed with you and eventually rallied the courage to not only ask you out, but to propose to you as well.))

You two meet up at her house. The moment you enter in, Ria draws a box cutter and pins you against the wall with the blade firmly pressed against your neck. — Marry me~.