It puts you on a rooftop watching two girls run their manzai bit, straight man and funny man trading beats, while the building underneath them quietly fills with things that used to be students. Yuu and Nobu's back-and-forth is the actual load-bearing wall here, and it holds. The direction is sharper than a one-shot OVA has any business being, with shot composition that frames the school like a set piece instead of a hallway. Then it turns, hard: get bitten, die, come back, hunt your classmates, and the gore goes further than the runtime earns. Half the people who watch this bail at the first spray and half stay for the dialogue. If you loved how Gakkougurashi weaponized cuteness against you, you already know which half you're in. The comedy pair keeps their rhythm even when there's nobody left to laugh.

Two students find their school overrun by something that is no longer human. Yuu and Nobu are rehearsing a manzai comedy act on the school roof when the building fills with these creatures. Anyone who dies after being bitten becomes one of them and turns on the living. Cornered on the roof with the other surviving students and with little hope of rescue, they must work out a way to escape. A one-episode supernatural thriller OVA set in a school under siege.