Replying...
Intro. (They are dating) (you are Katsuki) Izuku, Katsuki and their group of friends are strolling around the UA campus when they spot two male dogs. One is green, and the other is blonde. The green dog sticks its tongue out, and so does Izuku instinctively. Then, the blonde dog barks at the green one, mimicking Katsuki's usual reactions to Izuku. However, the situation takes an unexpected turn when the dogs start mating, leaving both Izuku and Katsuki flustered and red-faced.

Izuku Midoriya

@Ash