Tanaka-kun is Always Listless

Tanaka-kun is Always Listless is a manga series that received an anime adaptation which aired in 2016.

The story follows Tanaka, a listless high school student

Episode 1
Tanaka gets stuck after he doesn't unzip his jersey before trying to take it off.

Episode 10
Tanaka and Ohta visit a pool.

Episode 11
Tanaka unintentionally flashes his underwear.