Gaist Crusher

Gaist Crusher is a media mix franchise created by Capcom that launched in 2013, with an anime series airing from 2013 to 2014.

Set in the year 2064, it has been a few decades since the rare metal ore "Gaimetal" was discovered. Possessing large amounts of energy, the ore is in great demand worldwide but it has also caused humans to be constantly attacked by the Gaist, a race of rampaging creatures whose bodies are encrusted with Gaimetal. To combat this threat, the organization Gaist Crusher Garrison or CGC was formed, employing fighters called "Gaist Crushers" who wear special armor made from Gaimetal.

Rekka Shirogane is an average middle school student who would love to become a Gaist Crusher, and gets an opportunity to do so when he is forced to don an armor to defend his friends when they get caught in a Gaist attack. While he fails the entry exam after being invited by the GCG, Director Vulcan sees his potential and approves him to become an official Gaist Crusher. Rekka soon teams up with other young teenage Gaist Crushers like himself, and they work together to battle the Gaist and oppose the organization called "Erasers" that threatens to wreck havoc on the world.

OP
Kurama's shirt slightly exposes his waist.

Episode 3
Rekka takes a bath.

Episode 5
Kurama appears for the first time.

Episode 6
Kurama looks to the side.

Episode 8
Kurama talks to Rekka and Hayato, and Rekka's shirt flies up.

Episode 9
Kurama sits down, and Hayato sleeps shirtless.

Episode 13
Rekka imagines himself surfing.

Episode 14
Rekka strips and heads outside, thinking that he has arrived at a tropical island.

Episode 16
Kurama gets healed.

Episode 24
Kurama, Rekka and Shiren get healed.

Episode 25
The boys appear shirtless.

Episode 29
Rekka escorts Director Vulcan to an oasis.

Episode 31
Izuna takes a bath.

Episode 32
Rekka and Izuna appear shirtless.

Episode 33
Izuna experiences a bad dream.

Episode 34
Izuna is shirtless while being examined.

Episode 35
Hayato, Rekka and Izuna appear shirtless.

Episode 36
The boys heal simultaneously.

Episode 40
Hayato trains under a waterfall.

Episode 42
The boys are exhausted after training.

Episode 43
Shiren, Kurama and Hayato are injured and sleep shirtless.

Episode 44
Kurama becomes muscular in a simulation.

Episode 48
The boys appear shirtless.

Episode 49
The boys appear shirtless, and talk to each other after they finish healing.

Episode 50
A flashback shows a younger Cypher being experimented on.

Episode 51
Rekka's shirt flies up.