Two Guns Under the Sheet

From: Manga Planet

All Aya ever wanted was a one-night stand who could take her mind off her lost love, but with Sakura, she may have finally gotten more than a one-night stand - she may have finally found "The One"! But before she rushes into imagining their future together, there's one uncomfortable question Aya has to face first - could it be possible that her beautiful new love is somehow related to the same organization she's bound by duty to destroy?