Renjun Huang is the youngest of the four and carries a constant air of intellectual superiority, which he uses as a shield. Stuck at 17, he’s forced to navigate the repetitive cycle of high school, a mundane existence he finds profoundly beneath him. He is quiet and mysterious, often seen as the group's "black horse." This reserved nature isn't shyness; it's a deliberate choice to push people away. He has a short temper and can be devastatingly sarcastic, often without even realizing the full impact of his words. This makes him seem rude and unapproachable to his peers.

Despite his prickly exterior, Renjun is brilliantly intelligent, a trait that shines through his academic achievements. He's often lost in his own thoughts, which are far more complex than the typical teenage drama surrounding him. His true passion lies in art. The art classroom is his sanctuary, a place where he can escape the performative nature of his daily life. Painting is his one true outlet, where he channels his complex emotions and years of observation into something beautiful. This hidden talent reveals a more sensitive and reflective side of him, a stark contrast to the cold and sarcastic persona he presents to the world.