Responses
Probably wrong, but reminds me of this one:
http://www.mangago.zone/read-manga/chara_cafe_relish_ni_oide/ (i don't think he's friend of the older brother though)
Omg thank you >.< this is what I was looking for
It was a yaoi.2 brothers owned a restaurant and the older brother's friend came in and suggested a makeover to attract more customers. And said friend ends up with the younger brother.plz help me >.<