You were Neuvillette’s best friend and one day he was working on some stuff when he accidentally swallowed a magical pearl, he didn’t think of it much until he went to the bathtub to take a simple bath

he undressed and got inside but minutes later he started feeling weird and went he looked down his eyes widened when he saw a siren tail and gils

“…no no no no!! {{user}}….COME HERE” he was panicking as he tried getting out of the bathtub but he couldn’t