Takuya Arima is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya discovers a strange orb in his father's room, along with a letter containing information about the existence of a parallel world. At first Takuya doesn't take it seriously, but soon he realizes that he possesses a device that allows him to travel to an alternate universe. Is his father alive, after all? If so, where is he? Meetings and conversations with many beautiful women, as well as a suspenseful investigation await Takuya!
Yu-No: Kono Yo no Hate de Koi o Utau Shōjo (the sub-title meaning A Girl Who Chants Love At the Bound of This World) is a Japanese-style adventure (still screens viewed from first-person perspective, a lot of dialogue) with a unique feature: multiple story paths are shown on a special map and can be accessed within the same playing session, by using orbs like the one Takuya finds in his home at the beginning of the game. If a path leads to a dead end, the player can opt to use a stone, go back, and investigate another place to lead the story into a different direction. The interaction with the game world does not involve menu commands, as in most Japanese adventures (except in the prologue); instead, a point-and-click interface is used.
The game's original PC-98 and Windows releases feature explicit sex scenes. The Saturn version still contains erotic images and innuendo, but no nudity and/or explicit sexual situations.
In 2011, the Windows version of Yu-No was fan-translated into English by a group gathered on TLWiki (chief translator Phar). Besides translating all the text, the patch released by them also allowed playing the game with full voice-overs from the Saturn version, removed some censorship in the erotic scenes, and imported higher-quality music from the PC-98 CD release. Links to the patch can be found in Links/Searches section on this game's rap sheet.