Manga raws currently at 25 chapters.
https://loveheaven.net/manga-jigoku-no-gouka-de-yaka-re-tsuzuketa-shounen-saikyou-no-honou-tsukai-to-natte-fukkatsu-suru-raw.html
If the master is a main recurring character then I'm out. He wasn't the meanest guy but that's even worse because he sent his disciples to suffer, not even die but suffer for eternity. Unless this spins it out to be that the mater somehow knew the MC would survive or whatever, I'm dropping this if the master sent him to die and then MC acts like nothing happened and is happy to see that little shit
Last I checked no girl is horny yet. The runaway princess only sees him as a friendly companion, while her lady knight bodyguard is being too overprotective and cautious towards MC.
Master is only a recurring memory for MC, but that's all so far. MC has no ill thoughts of his master, esp. after finding his master's diary later on and how he'd no choice in the matter of sending MC to his death. MC's pretty happy-go-lucky overall, but he did consider his master as a father figure and knows (from the diary) that the old man loved him like a son.