As Haruhi entered the sinister, yet studious Ouran High School building she was unaware of what was to come on that dark and spooky night. She tried to find a good place to to study the dark arts, but to no avail. Every room was filled with monster students. She then saw a door with a sign above labeled monster mash #3. "Sounds veird, but vhatever!" Haruhi said with her Transylvanian accent. The room opened with a barrage of black roses. "Welcome to the unnatural host club visitor!" the assortment of creatures said to Haruhi. "Hey, something's not right here! Who let a human boy in here?" replied two twin tricksters. "I wonder if he likes sweets?" The werebunny with a childish demeanor said. "Would you like to sign a simple contract with almost no strings attached? I'll only tell you the catch after you sign the said contract." said the demonic looking lawyer. "Uhhh... No thanks!" Haruhi said with fear.

Haruhi noticed a werebear next to the childish werebunny who hadn't uttered a word since she entered the room. She chose to ignore him for now. Haruhi felt so nervous that she tried to run, but accidentally ran into a display of some sort of glowing jar. It shattered and suddenly innocent souls started pouring out of it and escaped through the window. "Oh boy, did you just mess up big time!" the trickster twins replied. "What do you mean?" Haruhi asked. "Well... If you must know, that jar was full of one million innocent human souls. They were going to be auction at the monster auction mansion estate." They were worth 1,000 soul sapphires." "Wait, what? How much is that in monstro dollars?" Haruhi panicked. Trust us, you don't want to know." the tricksters replied. "Since you obviously don't have the funds to pay for said souls within the jar, you'll need to sign a life-binding contract. HAHAHAHA!" the sinister lawyer said evilly. "With that in mind, allow us to introduce ourselves." the vampire that Haruhi now noticed, but not before, when she had entered the room. "I am Tamaki! Self-proclaimed king of all vampires!" "We're the twisted twins! We're the sons of the trickster god, Loki!" Said the twins. "I am Hunni the werebunny, and this is Takashi, the werebear! But you can call him Mori!" "I am Kyoya, third son of the devil and also his third adviser!" "From this moment on you will be our human slave boy! HAHAHAHA!" said Tamaki.