The females Zamazenta and Mega Absol are from Nintendo's Pokemon and this screenshot's taken from Valve's Garry's Mod. It is done through Rushmao17's choice as part of celebration of Pokemon Day.

Ooh, better be careful guys. These lades not only gave you the fancy winks, but they just used Attract. once their hearts touch you, you may not be able to do something. You may end up being stuck for a limited time being in a crush on them.