Omega Labyrinth (オメガラビリンス), stylized as ω Labyrinth, is a 2015 roguelike dungeon crawler role-playing video game developed by Matrix Software and published by D3 Publisher for the PlayStation Vita. The game follows a group of girls as they explore a dungeon in search of the fabled "Holy Grail of Beauty", which is said to be able to grant any wish. Protagonist Aina Akemiya searches for the Grail in order to increase her chest size, as she feels uncomfortable about her small breasts. Omega Labyrinth has been noted for its heavy fanservice content and was released on November 19, 2015, in Japan.

Mao Ichimichi is a Japanese actress. She started her career as a Japanese idol member of Horipro's HOP Club under the stage name Rio Minami and is a gravure idol. She started an extensive voice acting career under the stage name M・A・O.