Help Me There's an arc where MC was send to a xianxia(?)-like world and became a gu expert. The body's mother was dead, but she used to be the gu/poisonous tribe's head, and had her son dressed as a girl (tradition I guess, the head of the tribe has to be a girl). I think the body's mother also used to gift a legendary gu to her former lover, but he betrayed her and kept the gu to himself Idk why So MC meet ML when the latter got bitten by a venomous snake when he was being chased(?). MC cured ML using a powerful(?) gu, and while ML was being treated, he fell in love with MC. After ML was healed, they got separated for years.