Uwakigokoro (“Cheating Heart”) [English], by Tsuchinoko
My brain says this is bad, very bad, and I should despise it. My dick says otherwise.
Basically, it’s all about your ability to accept this shady part of us who’d be tempted to accept to fuck with a friend’s BF/GF. Can you embrace the idea, the fantasy? Or would you simply love to do it? If yes: ENJOY! For the art is gorgeous, the woman has an extremely sexy face with wicked eyes showing she immensely enjoys to do a bad deed.
You’ve been warned, ok. The story: one by one, everyone leaves a karaoke party for various reasons, until the only remaining persons are a girlfriend and a single virgin young man. The girlfriend will propose a game, the young man will follow suit, first reluctantly, then with excitation.
By the same artist, I also share Hime No Kako