Angel Beats!

Angel Beats! is an original anime series which aired in 2010.

The series is set in the afterlife and focuses on Otonashi, a teenage boy who awakens with no memories of his life before dying. He enrolls in high school and meets a girl named Yuri who invites him to join the Afterlife Battlefront, an organization she leads which fights against the student council president Kanade Tachibana, a girl also known as Angel with supernatural powers.

Episode 1
Otonashi awakens in the afterlife.

Episode 4
Noda trains shirtless.

Episode 5
Takamatsu reveals that he's actually well-built.

Episode 6
Takamatsu walks around shirtless.

Episode 10
Otonashi and Noda's shirts fly up.

OVA 1
Takamatsu is shirtless throughout the episode.