Blue Drop: Tenshi-tachi no Gikyoku

Mari Wakatake was the sole survivor of a disaster that killed the people of her island, but her memories of it are gone. Years later, she enters a girls' boarding school with anger and loneliness she cannot easily conceal. There she meets the composed Hagino Senkoji, whose presence provokes an inexplicable reaction.

Their connection deepens through school life, while Hagino conceals ties to an alien world and to the catastrophe in Mari's past. As extraterrestrial forces move toward Earth, painful truth and conflicting loyalties threaten their growing trust. Protecting one another becomes a choice with consequences far beyond the school.