Two episodes to recognize your lost brother in another person's face, then watch the ground shift under everything you thought you knew about him. The romance isn't a subplot bolted onto a fantasy premise, it is the premise, the wound, the question that survives the earthquake into whatever world comes next. A show built entirely on the vertigo of wanting someone you've just met because he looks like someone you've already lost.
Shou arrives at Yuusei Academy with a strange certainty: somewhere in this school is Kai, the twin brother he lost years ago. The headmaster's casual mention of this student ignites a desperate hope that maybe, finally, his fractured past can be made whole again. That fragile dream shatters when a sudden earthquake tears reality open. Shou finds himself thrust into a parallel world alongside two classmates, stranded and disoriented. When a monster emerges from the darkness to attack them, something awakens inside Shou: massive white wings burst from his back, radiant and impossible. The revelation spirals into bigger questions. These wings connect to ancient legends of a winged kingdom long forgotten. They suggest Shou is far more than a regular student, and his reunion with Kai might be something far grander than a simple family reunion. As Shou grapples with his newfound power and the mystery of this strange realm, he realizes that discovering who he really is means confronting a destiny he never knew he carried.