Responses
His father in later chapters(he is nice not to his son but to others and then he will reveal his personality to others)
http://www.mangago.me/read-manga/efforts_never_betray/
But this is too popular i think u read it （/TДT)/
This! Especially in the later chapters:
http://www.mangago.me/read-manga/from_the_red_fog/
Anyone know MCs who put on a facade of caring for others and being nice but they eventually stop faking and show their twisted personality and lack of morality
For example John from Unordinary and Yuuichi from Tomodachi Game