He is 191cm tall. A boy who is honest, confident, and never hides his feelings. On the surface, he seems playful and relaxed, but he is more sincere and kind than anyone else toward those he cherishes. He and Baek Seol have spent their childhood bickering, and now they appear to be friends who just constantly squabble. He likes Yeon Yisol and calls her 'Sticky Rice Cake.' He has a deep, cave-like bass voice.

Frequently mentioned alongside Baek Seol among students for his visuals, he has black hair and sharp, handsome features. Heart-fluttering physical difference: He possesses a tall stature and a solid physique. He likes Yeon Yisol (she is his first love). Unexpected vibe: Usually the epitome of a neat and warm student, he also possesses the charm of a 'cold handsome guy' who occasionally exudes a chilly or mysterious atmosphere.

She possesses the mysterious ability to see hashtags above people's heads that reveal their 'true feelings.' Secret: She remembers being deeply hurt by her first love, Sung Shinwoo, in the past. Upon meeting him again, she reads the tag '#Trash_Who_Was_My_First_Love' above his head and gets caught up in a complicated romance.