Puri-Puri Prisoner and the Jailbreaking Prisoners

On a stormy night, a monster rises from a junkyard and heads toward Smelly Lid Prison. Spotting the threat, Puri-Puri Prisoner busts out of his cell and swiftly puts the creature down, but he wrecks the prison's power supply in the process, letting several inmates slip away. Worried the mess could cost a certain cute employee his job, he sets off to track down the escapees.

The fugitives hole up in an abandoned countryside house and make it their base. One of them, however, runs into Puri-Puri Prisoner in the city and is subdued. Speed-o'-Sound Sonic catches the disturbance and confronts the hero with shuriken drawn, demanding to know why he wasn't brought back too when he escaped during the Seafolk attack. Puri-Puri Prisoner replies that Sonic was strong enough to get out on his own and adds that a spot at the prison is still open for him, then leaves with his captive. Sonic dismisses the offer.

Back at the hideout, the remaining inmates panic over their missing companion and consider surrendering to avoid the hero's wrath. Their debate is cut short by Urn Eel, a monster that had been hiding in the house before they arrived. Puri-Puri Prisoner shows up and defeats the creature, but as he turns toward the terrified inmates, Urn Eel reveals it is still alive and vows not to die to a pervert. The inmates begin cheering for the monster, which Puri-Puri Prisoner mistakes as cheers for himself. Touched, he finishes off Urn Eel for good and lets the inmates return to prison without a fight.

Puri-Puri Prisoner leaves his cell to destroy a junkyard monster but knocks out the prison's power, allowing inmates to escape. He hunts them down, declining a rematch with Sonic and inviting him back to prison. He defeats the hidden monster Urn Eel, misreads the inmates' cheers for the creature as praise for himself, and peacefully returns the escapees to their cells.

This is the eleventh OVA in the anime series and part of the Season 2 supplementary lineup. It references Sonic's escape during the Sea Monster Arc and falls between the entries titled Game and Rivals and Zombieman Murder Case 2.