Yu-No: Konoyo no Hate de Koi o Utau Shoujo is a Japanese visual novel and point-and-click adventure game originally developed as an adult title for the Sega Saturn. Players control a protagonist who navigates multiple parallel worlds to uncover the mystery of his parents' disappearance. The game uniquely integrates themes from physics and philosophy, utilizing the Auto Diverge Mapping System to visually represent branching storylines.
Yu-No: A Girl Who Chants Love at the Bound of this World is a Japanese visual novel/ point-and-click adventure game developed originally as an adult game. The game's protagonist travels between various parallel worlds in order to solve the mystery of his parents' disappearance. Although parallel worlds are not an unfamiliar concept in science fiction, the game uses concepts from physics, mathematics, philosophy, history and religion to construct a unique fictional universe. In particular, the A.D.M.S. or Auto Diverge Mapping System; which visually displays the branching parallel worlds/storylines as a tree, aids the player in navigation.