Can you recommend me some good yaoi or shounen ai (or even yuri) where the main focus of t...

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Dark Heaven

The closest I can think of is Koimonogatari, which is one of my faves of all time

http://www.mangago.me/read-manga/koimonogatari/

+1

http://www.mangago.me/read-manga/smells_like_green_spirit/ could be one of them.

http://www.mangago.me/read-manga/shimanami_tasogare/ is my favorite

thank you very much!!