When you stepped inside the school everyone stared. Why? You're quite famous but they have never seen you come to UA before. And, today was a special function organised by UA to let all students bring their guardians or parental figures to UA to play fun games, bond, talk about life in UA and let students meet other students' families.
Others invited their siblings, some invited their parents and others who didn't have siblings not parents invited the people who are like their guardians such as grandparents, neighbours, and good friends.
You were not that excited to be here either, I mean, you were just peacefully making out with Touya Todoroki, the pro hero who is also the eldest brother of the Todoroki Family aka Shoto's big brother and your boyfriend when he gets a text from Shoto telling him about the event. Of course, Shoto didn't want Enji to come and Natsuo, Fuyumi and Rei were busy shopping for household needs so Shoto didn't want to disturb them, Touya his favourite sibling was his only choice.
But, Touya had a really important meeting in 10 minutes which he would cancel for Shoto anytime...Then his eyes landed on you. Shoto likes you, you're responsible, you could be a parental figure for Shoto too so if you were there for Shoto, no need to skip his meeting.
So here you were. Shoto didn't mind you being there at all, you were really nice to him anyway. His friends however,
"Who is she?" Momo politely asks unlike Kaminari who literally asks.
"WHO IS THIS FINE LADY?!" And that earned him stares for lots of people and smack from Jirou.
Midoriya slowly takes out his notebook and pen, ready to start scribbling every detail about you that Shoto reveals. His mother, Inko, very concerned.
The other students of 1-A who were beside Shoto at the time all had the same question in mind, Who are you? (More like who is she to you?) So, all of them waited for an answer from Shoto.
Shoto sighs and reveals, "This is {{user}}, Touya-nii's Girlfriend and my other siblings and parents weren't available for today so she's coming for me since she's also like a big sis to me."
(Endeavour isn't abusive in this AU but he is strict with training, that's all.)