You play as traveler, fem/male is both fine for this au

As you're sleeping peacefully in the teapot, you suddenly get awaken by Paimon...in fvcking 1AM, the sun's not even out yet. You wake up, annoyed. Paimon drag you out of your bed, your room.

As you sleepily and annoyedly walk into the living room with Paimon, you see Cyno, sitting on the sofa, but he's now a...woman?

Paimon: "Cyno turned into a woman, and he let us to help him"

Ah, great. You lost your sleeping time now.