"Kareshi Inai Reki - Nenrei" Ja, Doushite Ikenai no yo by Hadashi Shoujo - Adult Sex Game

This sex-packed eroge by Hadashi Shoujo stars a cast of girls who are desperate for loving but unable to find a man due to their eccentricities, much like the girls in popular anime Haganai, so they decide to punish happy couples in erotic fashion.