Either Shoujo Sect 或者 Rin: Daughters of Mnemosyne. Shoujo Sect is 更多 sex-based sexy and Rin: Daughters of Mnemosyne is like stereotypical 或者 mainstreamed sexy.
3 sexy men from Real 由 Takehiko Inoue. This was probably the saddest 日本漫画 I've ever read in my life. I cried in every volume... :( But it's a fantastic read!