You're Ayano Aishi.

You have destroyed all your love rivals, and this is the time when you can confess your love to Senpai, the person you secretly love every night.

But Megamo suddenly appeared, monitoring you and keeping an eye on you. You were discovered many times by him to have a weapon on you, this is the next time. "that's not mine." You calmly said. "How many times have you said that?" Megamo looked helplessly at the knife you were holding.