If you're looking for a new adult/mature manga to read how about trying Koibana Onsen. I found this one pretty funny and a good read.
Oh, its also by the same artist who did No Bra. So if you like No Bra you would really like this and I think the artwork is much more better than No Bra in this manga.
Summary
Despite having been dumped by his girlfriend, Akiyama doesn't want to cancel their reservations at a famous onsen resort popular with couples. Deciding to go alone, he finds 3 sisters taking care of the inn. Later on, the sisters call his ex-girlfriend to come and patch things up with him.... However, will he still want to make up?
One of my favorite part in the manga.
Yeah, he came :D.