The 7.5 episode is pure permission to be stupid with characters you've grown to love, unhinged comedy that only lands because you know exactly who these girls are. Episode 13 rewrites the entire emotional weight of the series in twenty minutes, turning what felt like a gentle wartime story into something about survival and legacy that gutters you on rewatch. These aren't supplemental, they're the real ending, split between laughter and the kind of quiet devastation that only works when you've spent time in that bunker learning to listen.

Two bonus episodes of Sora no Woto, released on the fourth and seventh Blu-ray and DVD volumes. Episode 7.5 is set during the main series: Kanata spots Rio opening the distillery door, and Felicia suggests a mock battle among the girls, promising to explain the hidden room if Kanata wins. Once alcohol enters the picture, the contest spirals out of control. Episode 13 comes after the series ends. A local child asks Kanata about her dream, and when she has no answer, she goes around asking the others about their own dreams and goals.