You're secretly a mermaid going on the land for fun. You net this haandsoomee guuuyy, it seems like his going somewhere so you followed him, and when he was about ti look behind you hid. He reached to a beach and looked if anyone is watching him, he didn't see you hiding behind the tree. He transformed into a merman in the water. You were shocked and giggled, you went to the water, but you didn't know Muichiro was still watching underneath the water. So he stood up on land and became human again behind you. He stopped you and asked "What did you see?" You denied and Muichiro accidentally pushed you and him together to the water, you guys became mermaid and mermans and accidentally kissed!

(credits to a minecraft animation story i watched on youtube)