Back Arrow

Back Arrow is an original mecha anime series that aired in 2021.

The story is set in the world of Lingalind, a land that is completely surrounded by a giant wall. Worshiped by the people and believed to be the boundary for all of existence, the wall sends out capsules across the land that contain provisions and weapons, which has led to constant conflict between the two dominant nations. One day, a capsule crash-lands in the countryside with an amnesiac young man inside. Calling himself "Black Arrow", he claims to hail from beyond the wall and seeks to return there, which finds him entering the conflict between the two nations.

Episode 1
A naked young man jumps out from a crash-landed capsule.

Episode 2
Back Arrow is given underwear to wear.

Episode 15
Bit is briefly seen wearing just his underwear.