Lust Geass, Vol. 2

Souta and Rikka are officially going out now, and their relationship remains as steamy as ever due to Zepar's curse of lust. But things heat up even more when Rikka's friend Makoto comes across the grimoire— with her desires unleashed, nothing will stop her from taking what she wants! As he's forced into a secret affair, can Souta find a way to break the spell on Makoto while staying true to his love for Rikka, or will he be sucked dry by the two girls' passionate cravings first?!

Volume 2 of the Lust Geass manga series by Osamu Takahashi.