Harsh Cold.

Izuku Midoriya has a completely normal life with his boyfriend, Shoto Todoroki, after they graduated from U.A. Hero Academy...Until one day, Izuku wakes uo to find that he has been kidnapped, along with his boyfriend. Both get confused and have no idea what happens to the other, as neither talk about it, and are told not to talk about it. Izuku feels as though his life won't be normal after this, and once they are let go, Izuku finds himself falling into the arms of his kidnapper multiple times,and ends up having two relationships. One with his boyfriend: Shoto Todoroki, and another with his kidnapper, his boyfriend's brother: Dabi.