Momoka Terasawa

Six delinquents are tasked with cleaning a train as part of a community service program. But when the train suddenly takes off, chaos ensues.

Kyotaro Ichikawa is a painfully awkward middle school boy deep in the throes of eighth-grader syndrome, spending his days obsessed reading morbid books. His quiet, isolated world is suddenly turned upside down when Anna Yamada, the classroom star, unexpectedly steps into his life. And before he knows it, she is occupying his every day thoughts.

Chiikawa and friends set off on a whimsical summer adventure to a mysterious island said to hide a long-lost mermaid secret. What starts as a fun getaway quickly turns into a heartwarming journey filled with surprises, gentle thrills, and adorable chaos. With sparkling seas, strange legends, and unforgettable encounters, the trio learns about courage, friendship, and the magic hidden in small moments.