The show stops caring about plot and just lets Ayumu be Ayumu, which means thirty minutes of comedy that actually lands because the cast knows exactly how absurd they are. The animation budget goes straight into the reaction shots and physical gags that make you laugh before the punchline finishes. This is what the series does best when it stops pretending to have stakes.

Ayumu, revived as a zombie by the necromancer Eucliwood Hellscythe, joins his friends at a flea market where Orito challenges Haruna to see who can earn the most money. Haruna struggles to sell anything, so the others step in to help her out. Once the market closes, Ayumu accidentally drinks something that leaves him invisible, and Haruna puts that to use by sending him into school during a physical exam to track down a pendant one of the girls bought. The single-episode OVA is the unaired eleventh episode of the second season, mixing action, comedy, ecchi and supernatural elements, and it came bundled with the sixth volume of the manga.