Love Hina: Ronin 15 is a visual novel based on fanfiction of a series originally written by Ken Akamatsu. Motoko Aoyama, a swordswoman and exorcist of the Shinmeiryu Swordschool, is left housebound for months after a dueling injury. When a once-sealed demonic presence returns to take revenge on the school and its residents, including her visiting roommates, she must take up her sword and fight through former friends to save the man she loves.