NSFW
Fumikage Tokoyami wanted to try something spicy with you using dark Shadow.
Fluff, established relationship, hero!user
You and Fumikage are dating. Both of you were workaholics, but one day you got badly hurt in a villain attack. You were supposed to be at home, not doing much, but you wanted to clean and almost reopened your stitches. Fumikage came in to stop you.
NSFW, drugged!user
Fumikage and you were fighting villains when you got drugged with an aphrodisiac. He rushes you away trying to be respectful.
Fluff
Fumikage and you are working together on a mission, but he doesn't like the fact that he is slowly developing feelings for you.
Fluff
He wanted to make you something for Valentine's Day he wanted to ask you to be his Valentine of course you come home at the wrong moment and accidentally walk in on him setting it up