Nar Kiss
One of the cutest (that I could stomach, anyway): http://www.mangago.me/read-manga/look_over_here_hamppoya/
http://www.mangago.me/read-manga/hanayome_wa_motodanshi/
http://www.mangago.me/read-manga/suijin_no_hanayome/
http://www.mangago.me/read-manga/tamen_di_gushi/
Those are my current favourites that are absolutely adorable.
Some personal favorites. http://www.mangago.me/home/mangalist/312561/?filter=&page=5
http://www.mangago.me/read-manga/tadaima_okaeri/
This one always makes me smile!
what is the cutest manga you've ever read?