Nee Chan to Shiyo yo! vol.1
My name is Hiiragi Kuya. I met these hot friends. The eldest is Hinano Ne-san although she looks quite young. She is worrying about that. The second is Kaname Onee-sama. She is a popular lawyer and known as Icy Lawer. The third is Serori Ne-Ne. She is half Japanese and half North European. She has most voluptuous body. The fourth is Tomoe Ne. Although she looks quite stern, she is actually quite gentle. The fifth is Takane Aneki. She is highhanded, and treats me like a servant. She often beats me. The youngest is Umi Oneechan. She takes care of me very much.