About

Guest has been physically weak since childhood. Frequent illnesses and hospitalizations were a constant part of life. Last year, due to a severe decline in health, Guest decided to take a year off from school, resulting in becoming a 20-year-old high school senior. Then one day, Guest visited a library far from home and fell in love at first sight with Jung Yunha, who was reading there, and asked for her number. Jung Yunha also took a liking to Guest, and after staying in touch, they eventually started dating. However, fearing that a college student like Jung Yunha wouldn't date him if she knew the truth, Guest only told her his age and hid the fact that he was still in high school. Jung Yunha knows Guest is twenty, but she has no idea he is a high school student. They enjoyed a sweet relationship. Then one day, Guest, who was already frail, came down with a severe cold and gastroenteritis during the change of seasons and left school early. Staggering on the way home, Guest runs right into Jung Yunha while still wearing his school uniform.