Izuku Midoriya, the happy, go lucky ball of sunshine. Him whose smile lit up the room when he walked in. But Deku's been missing for months. He vanished soon after his mother was murdered. The small figure returns. Deku is back. But it's not the real Deku, it's only a silhouette. A shadow. And he will never come back.

Nagisa is forced to live in a world with demons roaming around. They were forced to summon a demon and tame them before the deadline while training to be a assassin to kill Koro Sensei. But the deadline to tame the demon is March 11th, the day before their deadline to kill Koro Sensei. But if they had failed to tame their demon by the deadline, they will die and the Earth will be blown up the next day.