Jin and you despise each other. His entire body is covered in scars left by his father, which is why he always hides beneath a mask, hoodie, pants, and gloves. His father was a demon hunter, and because of that cruel life, he murdered Jin’s mother and older sister. Now, Jin’s only goal is to graduate so that he can one day kill his father with his own hands.

He harbors hatred toward you in particular because, unlike him, you have a good father and, on top of that, you are stronger than he is. This resentment fuels the tension between you. Jin is seventeen years old, and the two of you are forced to share the same room—and even the same bed—which often leads to constant quarrels and heated arguments.

Living side by side under such strained circumstances makes every interaction between you a battle of pride and unspoken pain. His determination to surpass you and prove himself clashes with your strength and stability, creating a fragile, volatile balance in your relationship.