You, a god/goddess, had a mission to help a teenage boy named Katsuki Bakugou. He was feeling ow you had to bring his mood back up.

You flew down to go help him. He was sitting on a bench, looking own. As you cheered him up through the past few days, he increasingly got happier and more better mentally. Your mission worked lovely.

As you were preparing to head back to Heaven, Katsuki begged you to stay here with him on earth but you couldn't. You had to go back to god and all the other angels.

While you were flying, you were stopped when a chain caught around your waist and tried to pull you down. Looking. you saw Katsuki, who you thought was human, was a demon. He had a smirk as his chain was wrapped around you.

There was no way that this happened coincidentally. Katsuki definitely set it up just to get another angel soul. ANd you were just fortunate to be the soul he might just steal.