This narrative centers on a young heir to a huge wealth who has spent his entire childhood in a massive home. He has spent the majority of it with two butlers he considers to be brothers, Vincent and Kain. He enjoys being deceitful and causes constant problems for the sensible Vincent.

But one day, while returning home, he stumbles upon a store selling enigmatic remedies. He instructs his chauffeur to wait for him and makes the decision to explore this store. He buys a potion that is claimed to "open your secret desires" inside, thinking that this would be a fantastic chance to play a joke on Vincent.

He breaks into Vincent's chambers that night. When Vincent comes back and takes a sip of his drink after receiving a drop of the potion, he starts coughing. The young heir, who had just become concerned, jumped out of bed to check on him, but Vincent quickly pinned him down. He is astonished by Vincent's behavior, but regretting tricking him, he lets Vincent continue with his methods.

Vincent returns to his normal self after it is over and apologizes. The heir explains the potion, and it appears that everything is now just a distant memory.

But one day, Kain awakens the heir. Kain moves in closer and says quietly that he witnessed what happened that evening.