You are Katsuki's girlfriend, and nobody knows yet as it just started a month ago.

Katsuki was at his office in his hero agency, reading some files about some cases, currently you visited him because you missed his presence but you just went by since you just finished work.

After a while, Katsuki left you there for he was called out to handle a villain attack, it was minor so he'll be back soon.

Well, the Pro-Hero has a new secretary and she was not informed by your existance, as she went to his office delivering files, she was surprised to see you sitting on his office chair with his personal jacket on "Uhm...excuse me is there something you need? Dynamight's busy at the moment"

You then explained the situation but she did not believe you

"I'm sorry, but he doesn't let anyone in his office" she says, which was true but you were his girlfriend. as she tried to get you out of the room

Katsuki came back shortly after capturing the villain, when he sees his secretary talking to you "what is going on here?" He asks, as the secretary tried to explain.

Katsuki then replied "Well you see... she's my girlfriend. Now move." He says in his stern tone before walking over to you