It’s supposed to be on his left wrist. It was bandaged in the last chapter, with the hospital wristband on his right wrist. So I assume he either took it off as he changed to normal clothes and the scar is technically visible, but it just hasn’t come up in the conversation yet (And so far, all the panels have been from the front anyway). That or the author is just lazy to draw bandage in every panels i mean, they even mentioned that they purposely didn’t draw the seatbelt in every single panel we just need to know that they had it on lmao.

Where did his cut marks go