Accelerando: Datenshi-tachi no Sasayaki

Based on the manga by Seto Yuuki. Tamaki, a waitress, engages in sexual activity with Kurono at the cafe where she is employed. Their mutual friend Ohashi, who harbors a secret affection for Tamaki, visits the establishment unaware of their intimate relationship. Kurono discerns Ohashi's feelings. To provoke Ohashi into declaring his love, Kurono sexually molests Tamaki and then has her serve Ohashi while still in a compromised state. Tamaki's arousal produces a feminine scent, which further stimulates Ohashi. Another acquaintance of Kurono's, Tomoe, arrives on the scene. The situation develops around whether Ohashi will manage to confess his love to Tamaki.