"Koyou, you're at your limit." Kouyou is a male beast known as a Lycan with very powerful sex hormones. Jade is the beautiful and macho one being driven crazy by those hormones as they are as strong as the hormones produced by a male cat in heat. Jade helps Kouyou relieve his sexual tension, but only to avoid the trouble that comes with the other males around him being driven insane. He does it as a medical service and only engages in foreplay. 人類強化獣種の中でも強力な性フェロモンを持つ光陽に、ひとり抗う右腕・ジェイド。光陽がどんなに望んでも、ジェイドは決して挿入しないーーー。恋とホルモンに振り回される、非凡なふたりの関係の先には…？