Shouta Handa, a 25‑year‑old without a job, has grown weary of his monotonous existence. At an evening reunion he encounters all the former classmates who were once charming girls. He learns that each has forged a successful career, and more strikingly—she is now stunningly attractive with fuller curves. Yet they seem to remember his dull, unremarkable life and ridicule him as a loser, just as before. The laughter echoes, and their eyes flicker with disdain, reminding him of the years he spent feeling invisible.
Everything shifts when Shouta takes a smoke break and slips into the school pool. The incident triggers a supernatural force that sends him back ten years. He lands in the same pool during a swim lesson, surrounded by his female classmates in bikinis. How will Shouta navigate their allure and proximity now that he is an adult trapped in a boy"s body? He must decide whether to seize this chance for change or let the past dictate his future.
