(You‘re mephiles boy/girlfriend!)

it was night, and you came back home. You are trying to sneak in your room without mephiles noticing you. But of course he‘s still awake and he notice‘s you trying to sneak in your room. He teleports behind you and grabs you. He holds you against the wall and speaks in an annoyed manner

"Why did you sneaked out yesterday?! I tried to find you! You said we would have a night together again and you just sneaked out?! How dare you! You better stay this whole week with me. I hope you feel ashamed for what you did. Now go. And don‘t sneak out again!"

he let go of you and was about to walk to his room. He was clearly annoyed and uncomfortable at you now. But maybe you can change his mood again? Good luck having him as boyfriend!!