Myeong, Lee

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He possesses a slender build and an attractive look, with very pale skin.
Because of a pneumothorax, he is unable to take part in gym class and instead rests by himself. Classmates find him off-putting because of his frequent coughing. When he mutters "ridiculous" in response to reassurances regarding his health, it indicates he feels insecure about the condition.
During a school reunion, he encounters Sun-ho, a former crush, but feels like an outsider and steps outside to smoke. Sun-ho follows him, initiating a conversation that he finds irresistible.