You're watching a single frame stretched across four minutes. Jin builds a mystery nobody asked him to solve, then answers it in reverse, and by the time the song ends you realize you've been inside the mermaid's head the whole time, not watching her from outside. The animation doesn't move the way animation usually moves, it breathes, it waits, it holds you underwater. What stays with you isn't the story. It's the specific shape of loneliness that only exists in a song this quiet.

MERMAID is a single-episode music video for Jin's song of the same name, with animation by Sora Tsushima, and it carries a Mystery genre label. Two versions of the song exist: Jin's own self-cover, posted on his official YouTube channel, and a version sung by KAFU that came out on February 25, 2022.