Struggling to meet a looming deadline, porn manga artist Jun Kitano pushes himself to the limit in "Hyper Erection Mode." When his friend Sonoko Mifuji visits, a relaxing bath with Miyuki sparks a bold new idea for a story centered on a forbidden teacher-student relationship. By using the two women as inspiration for his "Orgasm Laboratory" concept, Jun successfully completes his work, leading to a bestseller and a well-deserved vacation with Miyuki.