Rui wa Tomo o Yobu is a visual novel developed by Akatsuki Works. The game's protagonist is Tomo Wakutsu, a boy with a mysterious mark on his body who has been raised as a girl by his mother. When she passes away, Tomo continues to honor her wish that he live as a girl in spite of the problems it brings, but then he encounters 5 girls who also bear the same mark as him.
The game was originally self-published as an eroge on the PC in 2008, and then rereleased in 2010 with additional voice acting. A general audience version of the game has been announced by 5pb., due out in 2013 for the PlayStation 3 and Vita.