The Sirius, Spica and Vega Platoons have all taken leave. Their vacation spot: Captain Murase's family-owned Inn on Planet Carcalla. Just when Manabu thought the best three platoons of the SDF were forgetting about their duty, absorbing everything from Karaoke to careless betting bouts, a loud cry from another guest sends the detached units into orbit. The guest's feline friend, Tiger, has gone missing! Orders are dispatched, supplies checked, forces ready to search, the SDF platoons must always adapt in any given situation. After an unexpected twist of events, Manabu realizes that moments of tranquility shouldn't be taken so lightly.