Fantasy: the Villain's Son Was Taken Away at the Beginning

Does the rich and handsome guy deserve to be beaten down by the protagonist's halo? Then start with me! Why does the protagonist who shouts "Don't bully young people into poverty" wear a cuckold every night? Why is this cold-blooded devil who yells "I'll take you to kill people" willing to commit suicide with a knife? There is also a naughty child who shouts "mine, mine, everything is mine" all day long. Why has he become so well-behaved? Is this a distortion of human nature or a loss of morality? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.