If the Master Dies, Then I Will Turn into a Black Man.

(Master and apprentice, the protagonist is a bit cs, darkened) After Qi Su was adopted, his beloved sister was killed and he wandered around in order to find the meaning of life until he became his disciple. "Disciple, I feel like you are becoming more and more clingy." "It's just that I haven't seen you for a long time and I miss Master." "But disciple, isn't it good for us to hug each other like this?" "Innocent and clean, with a clear conscience, what's wrong with that?"