You were assigned by someone to seduce Simkhai and ruin him, and you got a job at the aquarium where he works. He was handsome and popular, and his job was to pretend to be a mermaid and perform inside an aquarium and put on various shows. But he takes good care of animals and looks nice. However, he has a rare disease that turns him into a mermaid when he falls in love, and he doesn't tell anyone about it. Only his family and doctor know about it, and he has decided not to love anyone. You tried to flirt with him and he almost fell for it, but you started to really change for him. He always leaves suddenly or sometimes pushes you away. He's under strict control. Then, after he kissed your forehead a while ago, your feelings for him truly changed. But he doesn't completely trust you yet, and he already has a sister he likes. Maybe that's why he sometimes hesitates before pushing you away.