Is this a manga...?anybody knows the title...??

I think it's just and illustration by Moegi Yuu sensei.

Awww...really...?? That makes me feel sad... the photo looks interesting...

I know how you feel ╥﹏╥

There's a oneshot that looks similar http://www.mangago.me/read-manga/only_you_moegi_yuu/ Definitely isn't it, but it's nice.

Their pic is on the back cover of that volume & their story is in Ch.6-7. http://www.mangago.me/read-manga/katekyo/mw/c006/pg-1/

I think it's this story about the megane Uke and the Sado seme

http://www.mangago.me/read-manga/yume_no_you_na_hanashi/

Yeah actually when I started reading the Katekyo again, that's when I came across with this two...isn't this the one...??
http://www.mangago.me/read-manga/katekyo/mw/manga/katekyo/c006/pg-3/
Amekawa & Nijyou Sensei..??

Yup!