Please Put Them On, Takamine-san

On paper, Takane Takamine is the perfect student council president — top grades, flawless reputation, the whole package. Then one day, she strips off her panties in front of the entire class after getting a 98% on a test, and the score just... changes to 100%. Nobody remembers it happened. Nobody except Koushi Shirota, the most unremarkable guy in school, who somehow wasn't affected by the time rewind. Turns out Takamine can reverse time by removing her underwear, and she's been using this power to maintain her spotless image. Now that Koushi knows her secret, he gets dragged into her world as the guy who has to help her — which mostly means dealing with increasingly absurd and embarrassing situations while she stays completely composed about the whole thing. The dynamic between them is what makes this work. She's shameless and calculating, he's flustered and just trying to survive. Their back-and-forth carries the comedy, and the romantic tension builds naturally underneath all the chaos. It's a 12-episode TV series from LIDENFILMS based on a shounen manga, and the ecchi premise is honestly just the vehicle for solid character comedy. If you liked the energy of To Love-Ru or the ridiculous situations in High School DxD but want something more focused on the two leads bouncing off each other, this fits that niche pretty well. The time-rewind gimmick keeps things from feeling stale, and the show knows exactly how silly its own concept is.