This is what I think each couple would do for their one year anniversary :)
Momo and Jirou:
Jirou would have a song just for Momo that she was working on for the whole year they were together. I also think Jirou would be working twice as hard to come up with money to buy something amazing for her girlfriend.
Momo would just make stuff with her quirk for her short girlfriend. Momo would also cook a fancy, FANCY, dinner for them. She's secretly an ✨amazing✨ cook. She also gets Jirou stuff for her music career. Like new guitars and mics.
Bakugo and Kirishima:
Kirishima would be unsure of what to do. He ends up getting a shark stuffie for Bakugo to remind him of himself since they aren't always with eachother. It's also because Bakugo as something called a little space since his childhood was a bit traumatic. He also just cuddles with Bakugo all at while watching movies.
Bakugo would paint. Yes he's an amazing artist because it helps with is anger isses. But after years he's become an amazing artist and paints a portrait of him and his boyfriend together. He also ends up getting him a sweatshirt with his hero name on it.
Shinsou and Kaminari:
Kaminari would just get Shinsou comfy pillows and blankets. He also gets him a sleeping bag with matching PJ'S. He also gets a Pikachu stuffie to remind Shinsou of him.
Shinsou would do whatever Kami wanted. He'd play Mario Cart with him like half the day to make him happy. He'd also write a poem for Kami. He's a very poetic writer and loves to write a lot. He also gets Kami a necklace with their initials on them and their anniversary date.
Deku And Todoroki:
Deku who is the sweet cinnamon roll that he is takes Todoroki to ✨therapy✨
Kidding, but he does take Todo to therapy once a week or every 2 of they're busy. But what Deku does is that he just cuddles with Todo since both work hard during class. He cooks Todo his other love, ✨soba✨
Todoroki just takes Deku on a shopping spree with his dad's credit card-. He buys him HELLA expensive All Might stuff. He just buys him everything he wants. Then they end up going to the carnival and have a blast.
If you guys want another chapter to this then let me know and I'll write one :)
Hope you have a good day/night!!