Katsuki was being surrounded by many girls and other mermaids/mermen..They all wanted to try and date Katsuki...

"Ugh...go away!" He said as he was trying to push away the people who got to clingy...thats when his eyes caught onto an adorable/attractive merperson...

Katsuki was supposed to find a lover soon...he was the mer-prince and he needed a lover to carry on next to him once he ruled the kingdom...