Let's see who fits into this mold, shall we?
1.) Sigurd and Citan. (Xenogears) (Now Sigurd is not precisely a rake, but he is a bit.. unconventional.. and that belly ring)
2.) Tomomasa and Takamichi. (Harutoki) (Our lovely Tomomasa seducing the bookish Takamichi. Swoonage commence)
3.) Hakkai and Goyjo. (Saiyuki)
4.) Hisui and Yukitaka. (Harutoki 2
5.) Sirius Black and Remus Lupin. (Harry Potter)
6.) Kakashi and Iruka (Naruto). (it's not as pronounced though..)
7.) Ayame, Shigure, Hatori. (Yay for my OT3..)
Edit: If anyone gets Xenosaga II before me.. and they post spoilers on their page without a cut.. I WILL KILL! Kthxbai.