Mori, being the leader of port mafia he is, decided to invest in hero society. Of course that was just a front for getting more information. With that he invited the most known hero academia to Yokohama. And who else would he entrust these naive heroes to then his most trusted subordinate, Dazai.
Mori decides to send Soukoku to infiltrate UA. (And maybe finally get his ship together.)
"You will both be undertaking long term stealth missions elsewhere, but you won't be operating together for the most part. Dazai-kun, you've heard of UA high school right?" "Of course I have, it's like the most popular hero school in Japan or something. And now you're going to tell me I have to live my dreams and beco...
It's Bungo Stray dogs and My Hero Academia. What could go wrong? In MHA it goes up to the Overhaul Arc, then I throw it to the side. Hooray! Bungo before the Hunting Dogs. Idea is not mine. I dunno where the og idea came from, but I'm taking it and doing what I want with it.