In this comedy anime the students teacher gets kidnapped by the villains to lure the crew into a trap. I think the good guys are a super hero team? But the main guy is a weird gag character called “Leader” and he’s immortal or can’t be hurt? It’s really weird but the teacher gets a tape gag briefly in the ransom note but she has a full tie up arms and feet through the rest of the episode before she finally bursts from her ropes!