Baby boom and the big problem

Katsuki is looking forward to going to the aquarium but realises everyone has forgot the plan, or had to bail out-as this little faces a big problem he realises he's left alone that's when Shinsou steps in and babysits what will happen find out soon (evil villain laugh) mwa haha.

This is my first fan fix so please tell me if I've done something wrong also please don't add this to any ddbl or se*ual reading list and please leave pg comments as this is a little safe space many thanks guys girls and non binary pals and everyone in between.

Oh yeah the images aren't mine and I don't own any characters of course there from Bnha