See that couple kiss in the bottom ad. Is that from a manhua? If so, which one??

The artist/author is Junko. It's a little hard to tell which one, but my first thout was Kasa No Shita, Futari. http://www.mangago.zone/read-manga/kasa_no_shita_futari/

Actually it's Recipe No Oujisama

http://www.mangago.zone/read-manga/recipe_no_oujisama/