Shun was your friend for three years, you had a crush on him since then but he didn't know it. He also didn't know that you'll kill any person who confesses to him. But little did you two know, you're the same. There were many students in your school who confessed to you but the next day they went missing. You didn't know that behind Shun's innocent face, he was the mastermind of that, he killed those people because he's obsessed with you, as if he only wanted you for himself, the same with you.