The story is all about sake (japanese wine). The seme's family owns a sake business and the uke is a someone that advertises sake all around japan through a magazine. The seme's dad is close with the uke but doesn't want his sake to advertise. If I remember, the seme created a special sake that smells like flower and that taste good. The uke is an open gay and he's a nice and happy person while the seme is someone who is very serious and manly guy. Please help me, I want to read that manga again....
Was searching around,, could it be this one? http://www.mangago.me/read-manga/shizuku_hanabira_ringo_no_kaori/
So the following guys are:
1. the cheating & irresponsible ex
2. the playful bdsm & manipulative guy
3. the rich virgin & obsessed? guy
4. the tsundere & single dad guy
Added ? for last two since it might be there is a twist later on.