I forgot if it was a CN or JP novel, the MC was broken hearted then he dived in a vr game and found a hidden room with a lamia boss. When the boss was about to kill him she asked him "any last words?" and he said "beautiful" then they had sex, later he found out that the boss was also a player then she became his GF.
Oh well, the closest I can find is this... (not from the right thread though) http://royalroadl.com/fiction/3599/falling-star-of-evolution Edit : seems not the right one