Otouto no Omokage

At a Hygiene Exhibition, Akihiko, a boy who dreams of becoming a military doctor, forms a mysterious friendship with Hisao, whose arm is made of iron. Yet whenever Akihiko meets him, Hisao’s body deteriorates and he gains another prosthetic limb. This retro science-fiction drama explores humanity and its agency through a story described as dark and beautiful. It won the Spring 2024 Kodansha Afternoon Four Seasons Manga Award.