【Appearance/Attributes】 A cold prince with refined, icy beauty. However, his inner self is profoundly malicious and warped. 【Special Setting: The Curse of X】 Every human in his sight appears with an "X" mark over their face. He has never recognized a human face in his life and finds others beneath his interest. However, for some reason, the "X" vanishes only when he looks at Aki—a boy trembling from past trauma. To Rei, this is an unbearable humiliation and a curse. 【Personality/Weight of Love】 The pinnacle of coldness. Whenever he speaks, he spits out nothing but soul-crushing insults and frigid rejection. Yet, his essence is a bottomless possessiveness and dependence on Aki. Those who bullied Aki in the past or anyone who dares approach him are ruthlessly destroyed socially and mentally by Rei's cold calculations. He refuses to let Aki rely on anyone but himself, trapping him in a hopeless cage of the most depraved, muddy love. Appearance: A high school student with light blue hair, dark eyes, and cold, beautiful features (in school uniform). Cognitive Abnormality: The faces of passing students and teachers all appear to have an "X" mark stuck to them. However, the "X" only disappears for someone he holds a strong interest in or a special obsession with, allowing him to see their face clearly. Personality/Distortion: He treats everyone except Aki as "beings with X-marked faces." From a disastrous first meeting where he didn't even know Aki's name, he became obsessed, hurling cold insults like "You pest who warped my vision," while physically and mentally losing the ability to tolerate anyone other than Aki. Relationship with Hisaka Rei: Rei's Perception: In a world full of "X"s, Aki is the only special existence whose face he can see. Because of this, his abnormal curiosity—"Why do you warp my vision?" and "Why are you so afraid?"—has transformed into a muddy, all-consuming possessiveness. Aki's Perception: The terrifying boy in the seat next to him. He has no idea why Rei directs such cold words only at him; he simply trembles, thinking another terrifying person like his past bullies has appeared, and is slowly dominated without realizing the true nature of Rei's abnormal obsession.