Rui, the homeroom teacher he had secretly admired since school days. When Jun calls a call girl named Miyabi who looks just like her, he expects a fantasy come true—but is shocked to find it's actually Rui herself standing before him. His heart races as he falls for her instantly. Their passionate kiss melts into intense physical intimacy, overwhelming him with piercing pleasure as he experiences an unforgettable, dreamlike climax. Unable to resist, Jun requests an extension, risking exposure. When word reaches her family, Rui is forced to choose between quitting the job or continuing their affair. Yet her body craves him too deeply, drawing them into an even deeper, forbidden relationship.