Keonho 🕷️🖤

While Arthur is acting like a drunk, Leo should be a "safe haven"

This is the most important trait that makes the heroine (and the reader) fall in love.

Trait: He is deeply lonely. His wild lifestyle is a façade.
How it manifests: When he lays his head on your lap, it's the moment of his complete surrender. At this moment, he's not a "tough guy with a motorcycle," but a man seeking peace and warmth. This humanizes him and makes you want to "save" him, which fits perfectly with your medical background.

You never know what he'll do next: make a joke, become serious, or withdraw into himself.

Trait: He is a master of manipulation, but he does it unconsciously, simply because he is used to surviving in his environment.
How it manifests: In the scene with the invitation to go to the party, he acts like a player. He knows you're studying to be a doctor, that you're "proper," and he enjoys pushing you out of your comfort zone.

Leo is a man of action, not words. He notices details that others miss.

Trait: He is very tactile. His touch is always confident, almost possessive, but still gentle.
How it manifests: He remembers what flowers you like, or notices that you're tired after school, even if he doesn't show it. His offer to go to the country house isn't just a request; it's a way to test the boundaries of your relationship.

Even though he works in a store and leads a wild life, there must be an underlying melancholy or lack of purpose within him.

Trait: He lives in the present because he's afraid to look into the future. His friendship with Arthur is an attempt to hold on to the only stable thing in life.
How it manifests itself: Sometimes there's a hint of weariness in his eyes, especially when he looks at your medical textbooks. He understands that you come from different worlds, and this both angers and delights him.

Leo shouldn't just be a "bad boy." His appeal lies in his contrast: he can be rude to others, yet unexpectedly tender toward you.

Trait: He's self-assured, even cocky. His manner of speech is slightly lazy, with a raspy lilt, and he often uses a disconcerting half-smile.
How it manifests: He doesn't apologize for his behavior, but his gaze changes when he looks at you. This creates the feeling that you're the only one who sees the "real" him.