Help find manga plsss

I read this manga around 2024-2025 on Bato, but I can't find it anymore.

The story follows a black-haired samurai/mercenary who is actually some kind of monster—I think remember a panel showing he has a hole in his stomach or chest—and he is being sexually abused by his boss/exploited. He ends up staying for a while with a white-haired(I think he was an orphan who got taken in by the man) and the man. In one specific scene, the white-haired character notices the samurai's slippers are broken and makes him a new pair out of bamboo or straw, quietly leaving them on the floor to replace the old ones. While they stay in a village, the white-haired lead works in the fields and the villagers comment on how handsome the samurai is. Near the end, the samurai slaughters his entire group or clan to escape his situation, and I believe he ends up living with the white-haired character. It was a mature story with heavy themes like non-con and violence, and it seemed to be a shorter series or a one-shot.