Kwon In-su, a medical student of SNU, doesn't really remember when a friend named Chul Seok became part of his routine - only that one day, he simply was part of his college life. Then a girl named Byeon Ari enters the frame. Chul Seok notices her immediately because Ari is the role model of SNU, known for her undeniable beauty, intelligence, and is fun to be with. However she is very unapologetic to grumpy foes like Kwon In-su. Trust thins in ways no one can name. In-su notices how Seok rearranges himself around her and Seok notices things he wishes he hadn't. What begins as mild discomfort to In-su grows into something harder to ignore, as moments blur and intentions become harder to name. And Ari - whether intentionally or not - stands at the center of it all. As days pass, In-su begins to wonder, is Ari the problem - or is she only revealing what was already broken? Nothing is openly wrong yet. No one crosses a visible line. Yet something shifts - subtly, persistently - and In-su is left with the uneasy sense that his life has been altered without his consent. When friendship curdles into suspicion, and silence becomes more dangerous than words, someone will be blamed. And someone will disappear. It is not simply about what happens when a friendship built in routine is disrupted by a fragment- it is a story of something else breaking inside but no one can agree on who truly caused the break. ⚠️ Disclaimer: This is a work of fiction that explores mature and intense themes that may not be suitable for all readers. Please proceed with caution.⚠️