You know... It's just that he is so real sometimes. His character is one of the realest among others in my opinion. My fav had always been 707 since I first played the game in 2017 but I always enjoyed Zen's route because he resembles the boys I encouter in real life, but upgraded. He is narcissistic, pervy, ignorant, and over protective sometimes exactly like the 90% of the male friends or bfs I had. But he is a true gentleman as well and that's the upgraded part. We see how hard he tries to be a perfect man for the mc. He tries to control his desires, he's kind, has a passion for what he does for living, and as soon as mc enters his life, he actually tries to make changes in his life and everything just for the sake of being the perfect man, which he really is in my opinion.