Hikaru Kodama and Ai are two of the hottest nurses competing for the love of one lewd doctor, whose passion for BDSM has engulfed the best friends in ways they themselves can’t possibly imagine. And now that the doctor has proposed his undying love for Ai and expressed his desire to marry her, Ai went to see Hikaru hoping to repair the rift that was made between their friendship. The two were on the verge of ecstasy when all of a sudden, a mysterious figure opened the door and caught both girls on top of each other. Who is this mystery guy? And what will he do after finding out that the two most beautiful nurses in their hospital were actually more than just best friends?