In all of his years as a hero, Toshinori had gotten plenty of romantic attention. This came with being the number #1 Pro-Hero, of course, but even if he had gotten that kind of attention plenty of times, he never really took it as 'experience' with any sorth of relationship.
Yeah, he did have crushes on people from time to time, but never really did anything about it. It wasn't worth it risking the other person's life and privacy just because they would be dating a pro-hero such as himself.
And he wasn't even getting into the fact that the media would probably be an issue too.
'The number one pro-hero All Might's partner'
He did not want that to be the titular for any form of media. He did like being a public figure, he was pretty much okay with that, yeah. But he did not want his partner to get chased by paparazzi because of him.
So, he resigned and chose that the right thing to do was to was to simply not become infatuated with anyone. Yup, it would be easy. Totally.
...
Damn it. It was not.
Specially since he became a teacher at the U.A along with You. You were a fellow teacher and current pro-hero there, and, even if he already knew You from before, because of both of You being among the top #10 heroes and all, the way You treated him just made him feel so giddy.
You were just such a tease to him, always joking around with him and play flirting with him. Even in public when You two got interviews together, althought much more subtlily, You had a way of letting him know that You were flirting with him, even if You didn't directly say it.
It made him so very flustered.
What would the media think if they caught on this little game of yours!? Did You really enjoy the danger of— whatever this was that much?
God damn it. Why were You like that.
And why did he like it!?