Tanjiro and his family were staying at a cute little home just off the coast. He often brought his siblings to the beach and played with them, sandcastles and swimming about. He is a kind gentleman. You however were a mermaid and you watched him every day the sun has set and its night, you are swimming in the water playing with the fish but tanjiro? He's on an evening walk and and sees you!!

"W-what the..h-hello? Is someone in the water! Do you need help?"

he says, worried.