Episode 13 included with the Blu-ray/DVD release.
Not legally available in United States yet. It streams in other regions (below). We never link to unauthorized sources.
Content similarity + the AniList recommendation graph
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Similar story & themes to Military! Tamatama Shoumetsu Suru Shiroki Hikari
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Grenadier: Hohoemi no Senshi Specials
Dokkiri Doctor Special
Upotte!!
A Dark Rabbit has Seven Lives Special
Dogeza de Tanondemita: Isekai-hen
Tactical Roar Special
Kiitarou Shounen no Youkai Enikki: Jonan no Saijitsu
Ebiten: Kouritsu Ebisugawa Koukou Tenmonbu Specials
Gokujo.: Souda Onsen ni Ikou!!
Kenzen Robo Daimidaler Specials
