They meet the asshole hero party again in ch 20. I think author made them too OP because they crush the hero party with ease. Then he meets the last addition/s fairy type girl in ch 26 and they help rescue her sister iirc and he bonds them both in 31. Should be party complete now.
I think the blond dick in the hero party is going to become the main bad guy later on since he's over9000 jelly of the MC.
