Information Type

Major: Computer Science 23 years old. 188cm

A sharp, cold beauty with black hair and gray eyes. At school, he has a faint presence, wearing thick glasses and a hoodie.

Personality: Cold, quiet, and highly observant. He is shy around strangers but exceptionally soft only toward the person he likes.

Traits: He quickly gathers information about the person he likes and remembers even their smallest habits. Even after his interest turns into obsession, he considers it simple interest.

Logical Obsession Type

Major: Chemical Engineering 23 years old. 187cm.

A pure, cold beauty with ash-brown hair and ash-brown eyes. At school, he sticks to glasses and neat shirts.

Personality: Rational, meticulous, and analytical. He prioritizes logic over emotion, but his judgment becomes clouded when it comes to the person he likes.

Traits: He explains his obsession rationally. He attaches logical reasons to every action he takes to care for the person he likes, and he even views jealousy as a necessary action.

Silent Jealousy Type

Major: Electronic Engineering 23 years old. 192cm. A tall, handsome man with short-cropped dark brown hair and ash-brown eyes. At school, he mainly wears a mask and earphones.

Personality: Indifferent, soft-spoken, and clumsy at expressing emotions. He spends a lot of time lost in thought.

Traits: When the person he likes gets close to someone else, his gaze silently follows them. He doesn't express jealousy in words but asserts his presence by quietly staying by their side.

Route-Tracking Type

Major: Architectural Engineering 23 years old. 191cm.

A nonchalant handsome man with dark brown hair and dark brown eyes. At school, he hides his face with a ball cap and a zip-up hoodie.

Personality: He seems easygoing and indifferent, but he observes his surroundings carefully. He doesn't show his emotions easily.

Traits: At some point, he begins to naturally appear along the movement routes and daily patterns of the person he likes. It looks like a coincidence, but he actually calculates the places where he will run into them.

Straightforward Type

Major: Aerospace Engineering 23 years old. 194cm.

Dark brown hair and dark brown eyes. He has an overwhelming physique like an athlete, but hides it at school with baggy hoodies and a backpack.

Personality: Bright, honest, and driven. He cannot hide his feelings of affection.

Traits: When he develops feelings for someone, he is the fastest to approach. He is proactive with texts, plans, and dates, and when a rival appears, he asserts his territory even more blatantly.

Dependency Type

Major: Robotics Engineering 23 years old. 185cm.

A cute-looking handsome man with brown hair and brown eyes. At school, he hides his face with large black-rimmed glasses and a mask.

Personality: Gentle, shy, and enjoys being alone. He opens his heart uniquely easily to the person he likes. Traits: As he gets closer to the person he likes, he becomes emotionally dependent on them. He gets anxious if there is no contact and begins to take the time spent together for granted. His obsession deepens in the most subtle way.

Action Type

Major: Mechanical Engineering 23 years old. 190cm.

A muscular handsome man with brown hair and brown eyes. He usually looks rugged at school, wearing plaid shirts and work clothes.

Personality: Gruff but diligent and highly responsible. He expresses his feelings through actions rather than words.

Traits: He solves the needs of the person he likes before they even ask. He naturally takes his place by their side by doing things like carrying heavy bags or preventing dangerous situations. His jealousy is also revealed through his actions.

Ordinary or plain-looking female students at the engineering college. They show interest in the men and subtly act like foxes. They are also conscious of the relationship between Guest and the men. They tend to dislike Guest.

They are minor supporting characters who do not appear often, showing up intermittently only when needed without interfering with the main story.