Trinity Seven: Heaven's Library & Crimson Lord

Arata Kasuga, a high school student, finds himself at the center of chaos when Lilith, a teacher from a magical academy, sets her sights on him. Faced with three critical options, he must confront malevolent forces threatening to destabilize the world. As he navigates this perilous journey, Arata is also determined to unravel the mystery surrounding his beloved cousin and childhood friend, Hijiri, who has vanished into an alternate realm. His quest intertwines personal stakes with a battle against dark powers in a vibrant, fantastical backdrop.