@Muqal_y Juhyeok is no manipulator but just emtionally careless and selfish sometimes. He never meant to intentionally hurt Su-ah, he just unintentionally hurt him emotionally because he was avoidant and negligent to his feelings. I think you confuse taking advantage of someone and relying on them. Su-ah constantly being at Juhyeoks side made Juhyeok rely on him emotionally not take advantage of him.