Which manga is this?

I think it's by Ike Reibun, don't know the title though

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

Maybe "Not Equal"?

Thank you both :)

opps, this is incest (not my thing), nice drawing though maybe I'll check mangaka's other works

You're welcome. ヾ(❀╹◡╹)ﾉ~

It's the best work of Ike Reibun.
I totally recommend to all as we can't completely say it's incest as there's a time travel involving.

I used to think that too, but I don't regret reading this one. The plot is great and keeps you intersted, the art is amazing. This manga made me cry. I love it! But if you feel that incest is a definite no-no that's ok too (I changed my mind after reading this, though xD). You can try e.g. "Bi no Isu" (one of my favs).

may give this a chance later,while fast forwarding/skipping bits i don't like maybe. Time travel+yaoi sounds interesting