Responses
I believe you are looking for this one:
http://www.mangago.zone/read-manga/kabeana_heaven_hole/
No its one where the younger brother found out because he was getting fucked on a park bench. Thanks though got me some more manga to read
hehehe I thought it was XDD but yay for adding one more into your library heheheh we can never have enough of yaoi manga XDD
Very true (づ￣ ³￣)づ
Looking for a yaoi where the older brother was having sex with men and the little brother followed and found out