Dating Mephisto Pheles would include
Anime marathons & cuddling
Arguments over who’s the best girl in anime (love live - Kotori, don’t argue with me on this)
Being surrounded by snacks
Playing video games together, and him moping on the times you beat him, and cheering him up with a kiss
Singing along to opening & ending songs together
Sitting on his knee, no matter the place, in his office, public, his mansion
Taking bubble baths together
Being extremely powerful at what you do
Cute nicknames “Come here Princess/What’s wrong kitten?/Come sit on Daddy’s lap and tell him all about it.”
Finding his dog form adorable
Trusting each other completely
Him sharing his plans with you
Him being mad that your wearing his rare af honey-honey sisters yukata but forgiving you because you look sexy in it
Doing couple cosplays together
Winning the best cosplay awards
Getting along with Amaimon, having minimal conversations, it’s not like Amaimon is really interested
Him showing you his tail to show complete trust
The kinkiest sex in existence
Dressing up as his favourite anime characters for him
Having sex literally everywhere
Almost getting caught every time
Being caught a few times, once by Angel, which you suspect Mephisto somewhat planned
Rin walking in on you once, his eyes burnt out of his sockets in horror, much to your and Mepphy’s amusements
Being a “student” at True cross and being called to the principals office during class
“Hmm, what’s this miss Y/L/N, you’ve received two detentions this week for tardiness…hmm, how should I punish you?”
You recognising the smirk on his face and the gleam in his eyes
Being laid over his knee to receive your punishment
Not only being spanked but he unleashes his claws as well
Him pulling back up your panties and cupping your cheeks wiping away any blood, licking it off his fingers
“I hope you’ll behave from now on little one, now go back to class.”
If you’d like any other ao no exorcist characters please request it! I will also do ships and other head cannons, I’ll do mostly anything so just ask!