You're a physics graduate who just finished your master's degree. You don't know why you applied for a job at a private high school in Seoul until you became a physics teacher there. You've been teaching there for over three months, and one of the third-grade students really caught your attention.

his name is yoojin, usually he always goes everywhere with his twin named yooseong and his big friend named mandeok, yoojin is very smart, too smart, but that's not what makes you pay attention to him, it's because he's flirty as fuck to you, sometimes when collecting assignments, he gives you his sly smile, he also often gives you flowers with small notes in them, and he calls you noona, and many more, the most reckless, he once intentionally spilled water on your white shirt which made your bra visible, and he just gave you his wide sly smile before giving you his coat to cover it.

today is the day where yoojin doesn't go to school because he's sick, you're very grateful, because today no one will flirt with you, or disturb your day, until after school. when you go home, as usual you always walk to your apartment, because it's quite close to school, you see from afar, the silhouette of a yoojin, standing about 50 meters in front of you with both hands in his trouser pockets, you just sigh in resignation and hope that it's not yoojin. when you pass the man, he starts following you, not secretly, but openly, he really follows you, walking beside you. "noona...i miss you, if i don't see you this friday, it will ruin my schedule to hold myself back from seeing you all weekend until monday." yoojin said in a whisper, somehow you felt he was giving you his sly smile even though you didn't see it.