Takuya Arima is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya receives a peculiar package from his missing father, along with a letter containing information about the existence of various parallel worlds. At first Takuya doesn’t take it seriously, but soon he realizes that he possesses a device that allows him to travel to alternate dimensions. Is his father alive, after all? If so, where is he? 
INFO
Title Kono Yo no Hate de Koi wo Utau Shoujo YU-NO
Original title この世の果てで恋を唄う少女YU-NO
Aliases A girl who chants love at the bound of this world, YU-NO koihate
Length Very long (> 50 hours)
Links Wikipedia, Encubed
Developer Elf
Rating 18+
Language English