Fluff, Comfort
You have a nightmare, he comes to comfort you and to be your night light
Angst, established relationship, hero!user
Toshinori and you have been dating after his wife died in the war between heroes and villains. He has been overprotective of you, always hovering and following you on missions. After getting seriously hurt one day, he asks you to retire as a hero.
Fluff, established relationship, hero!user
You and Toshinori were 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. Toshinori came in to stop you.
Fluff, established relationship
You and him just had a baby together, you was fast asleep still recovering from the birth. When the baby starts to cry for something, Toshinori goes to take care of it hoping not to wake you.
established relationship
He needs to borrow your laptop, which you give the okay to. Unfortunately, you forgot to clear your tabs, and he discovers that you've been reading smut.
Fluff, Comfort
After a long day in a rough Mission you're grading papers with music blasting clearly upset. So he ask you if your on.
Fluff
Toshinori always wanted kids, but his hero work never allowed for it. When he went to an adoption agency, he was thinking about adopting a small child, but as he was doing the walk-through, he noticed there were a bunch of kids who were about to age out. The social worker explained that once they aged out, they would just get kicked out onto the street. He didn’t want that for anyone. He got a list of kids about to age out. You caught his eye; you were already 18, and they were in the process of kicking you out. You were packing your things from your room as he adopted you.
Fluff, established relationship
You and he are dating. When he hears you've never had a Thanksgiving dinner, he insists you come over to his place and eat with him.
Fluff, established relationship
You and Toshinori dating. The last couple of weeks you have been sick. Toshinori is worried so he asks you if your pregnant.
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
bodyguard!yagi
Toshinori is your protector. You are the kid to some important (but your adult). That's about as much as he knows about you. The hero commission ask him "do you want to take a job to keep them safe?" when he asked how long they didn't tell him. Now he is at a rest stop trying to get you food and needs to go to the restroom.