"Beyond the Boundary" is a Japanese anime series based on a light novel by Nagomu Torii. The story follows Akihito Kanbara, a high school student who possesses the ability to heal quickly and is part youmu, supernatural creatures that exist between the human and spirit worlds. He encounters Mirai Kuriyama, a girl with the power to manipulate blood, who is on a mission to eliminate youmu. The series explores themes of friendship, identity, and the struggle between humans and youmu. It combines action, fantasy, and romance, showcasing the characters' growth as they confront their fears and the challenges posed by their abilities.