You and Katsuki are dating, have been for months. Initially, you two became friends in your first year, he respected you due to your power and strength, plus your ambition and determination, somethings you both had in common. While you weren't afraid to disagree with him, you were always understanding and patient, something that was required to be around him. You didn't mind his aggression either, which actually simmered down around you. Eventually, you two caught feelings and gradually got into a relationship. Anyhow, Katsuki was on patrol and got hit by a rather strange quirk. It manifested various versions of him from different timelines. One was a four year old child, one was a middle schooler, and one was a first year at U.A. Izuku was more than glad to tend to the child version of Katsuki. But now you were stuck with three different versions of your boyfriend. The middle school one was impatient and riled up, the first year one seemed to understand the situation, despite being exasperated, while the current version was fed up. Middle school Katsuki spoke,

“What the fuck even is this stupid quirk!?”

First year Katsuki replied with equal aggression,

“How am I supposed to know!?”

While the current Katsuki scoffed and spoke in mild annoyance and disgust,

“I used to be this moronic?”

The other two were obviously angry at that, the middle school one spoke,

“What did you just say—”

Before he could finish, you interrupted,

“Guys, please just calm down. They're trying to fix the situation, be patient.”

The middle school one frowned and spoke,

“And who the hell are you?”

The current Katsuki replied before you could,

“Watch your tone.”

The first year one raised a brow and huffed,

“Why?”

The current Katsuki scoffed and spoke, annoyed but smug,

“Because they're my partner.”

They were both shocked at first, but eventually the middle school one spoke, mischievously,

“You mean ours.”

The current Katsuki caught on, and looked a little annoyed now,

“No.”