Unforgettable (BNHA)

With his husband out of town, his friends all busy, the school term over, and all his work either dried up or completely done, twenty-nine year-old Aizawa Shouta finds himself incredibly bored. As most bored pro heroes do, Shouta looks for a case to solve and comes across that of a man terrorizing children in a district near where Shouta grew up.

Investigating leads Shouta to a forum for underground heroes that particularly focuses on his hero persona, and then to a specific person, a fourteen year-old kid who goes by the screen-name 'Mindjack', who is Eraserhead's biggest fan and happens to live in the district where Shouta's villain is.

Late night chats lead to Shouta getting attached to this kid and slowly becoming more and more intent on taking down the villain threatening his neighborhood.