HighSchool DxD: White Haired Hyoudou

Shiro Hyoudou is the adopted brother of Issei, and the childhood friend of both Irina and Xenovia. Both Issei and Shiro practically grew up together. But when Rias makes Issei a devil, Issei tries to keep that away from Shiro because he didn't want Shiro to get hurt. But little did Issei know, Shiro was something more...