When Killua meets the fujoshi master. The fujoshi master brought him to the world of immortality and gave Killua a training system. So what will happen to Killua?
Cultivation setting (demon, demon, human... All are this setting): Acquired; Qi training; Foundation building; Dan formation; Golden elixir; Nascent Soul; Transformation of gods; Distraction; Mahayana
PS: Killua is not the same as the original Killua.