Shirogane, a character in the Monochrome Factor anime series
In Extra, Takeru Shirogane (Voiced by Takeshi Aiba in PC and Soichiro Hoshi in Ports) wakes up one morning to find a beautiful young woman sleeping in his bed and an infuriated Sumika Kagami (Voiced by Rika Fujiwara in PC and Hiroko Taguchi in Port), Takeru's neighbor and childhood friend.