Itadakimasu from Yoshihara Yuki
I started reading Itadakimasu from Yoshihara Yuki... it's hilarious!
It's intended for mature audience (not really hentai though) and tells the story of a divorced young lady who ends up engaged to the younger brother of her ex-husband (who is still her current boss). Didn't have a good laugh like that for a while... :)
Not too sure about how to categorize it... manga-access.com mentions:
Comedy, Drama, Ecchi, Josei, Mature, Romance, School life, Slice of life, Smut