Sexy Gentleman's Superb Techniques -I'll Teach You How to be Sexy-

Rika likes to drink. She goes to this bar to find a "man with a wrist watch" who once comforted her when she got drunk. But the only man who talks to her at the bar is Masa, who's an unshaven older man... One night, Rika finds herself in a strange place after she passed out, and sees the man she was looking for kissing her and caressing her body... But when she wakes up, the man next to her was not whom she expected!

(Source: Renta!)

Note: Originally serialized under the title "Ero Shinshi no Gokujou Tech - Sono Seikantai, Ore ga Sodatete Ageru" (エロ紳士の極上テク～その性感帯、オレが育ててあげる).