Tsukimi is a plain, timid illustrator who lives a lackluster, job‑free life and is obsessed with jellyfish. She shares a cramped apartment with roommates who are diehard hobbyists, making them socially awkward and reclusive. The group keeps a strict, nun‑like routine and enforces a no‑men‑allowed policy, creating an insulated bubble that is shattered when Tsukimi brings home a rescued sea jellyfish and a beauty queen who is secretly a man. Faced with the possibility of losing their cozy, self‑contained haven, the glamorous male roommate inspires the neurotic group to reinvent themselves into a portrait of success. Will Tsukimi seize the opportunity to bloom, or will she end up a hot mess?