My omega's pup

Katsuki is an alpha math teacher who has been working in a particular school for eight years. He has gotten to know most of his students well and some he's stayed in contact with when they left school (but that doesn't happen often actually it might only be this one girl who was very smart and a good pupil and wanted to become a teacher so he stayed in contact with her to help her) this year though he gets a new batch of kids, they frustrate the living daylights out of him but he grows to like them.

I'm his class is a kid called Eijiro and he presented very early to be an omega. Katsuki has always had a soft spot for the little omega but when the omega needs help with his first heat what is Katsuki supposed to do? Turn him down? Ha! I like how that even crosses your mind, course Kat helps the pup in need...

But at what cost... is it a good thing that he enjoyed it and nether regret any decisions that were made last minute?

~quirkless au~
~art not mine~
~teacher x student, don't like don't read~
~a bit of smut~