...you want a manga with only an uke playing with himself?
lol
I know you posted this almost 4 years ago, but incase someone still needs it: This one has 2 ukes playing together with a dildo: http://www.mangago.me/read-manga/free_dj_pori_yuri/mi/78e65b386bfda2a58fbd7c18ec201dd2_chapter-1/
Ugh, I hate semes.