Dunamis 15

Dunamis 15 (デュナミス15 Dyunamisu 15?) is a suspense visual novel developed and published by 5pb. for the PlayStation 3 and Xbox 360. The game was released in Japan on September 15, 2011,[3] featuring five chapters and five main characters. A port for the PlayStation Portable was released on July 26, 2012.[4][5] The sequel title, Disorder 6, was released on August 22, 2013. This is the first title in Suspense-fiction Adventure series, a spinoff to famous Science Adventure series.

Takatsuki Tougo is leading a boring life at Ceres Academy, located on an isolated island called Dunamis Base. One day, while rushing to class after having overslept, Tōgo stumbles upon a mysterious girl in the school hallway. This brief encounter then changes Tougo's life forever. Time in the game will loop, so the player will end up experiencing the same story repeatedly. The player will need to follow the proper route in order to escape from this loop.