Kiribaku mermaid/siren AU

In this world there are merpeople, there are still quirks and there is still UA but also merpeople, who the rest of the out-of-water people do not know about.
The UA hero course classes are taking a trip to the beach, the girls are talking about mermaids. Bakugo doesn't believe in mermaids, not at all.

Meanwhile, Kirishima is having the time of his life in his underwater town with his fellow mermaids and sirens.