The twins play the "Guess who is Hikaru" game with the guests in the host club. The twins claim that no one has ever beaten this game before when Haruhi interrupts, saying the game is stupid. She then correctly points out who is Hikaru and who is Kaoru. The twins denied her answer, but Haruhi insisted she is correct because Hikaru is "one level meaner then Kaoru". When this is said, Kaoru couldn't help but laugh and Hikaru felt offended. An argument occurs which triggers a fight between the inseparable siblings, even making them dye their hair different colors, blue and pink, in order to be told apart. When Haruhi finally stands up to their fighting, saying "if they've never fought before, they might need help stopping," Kaoru is about to give Hikaru a cursed Beelzenef doll with his name written on the back - but when Haruhi steps in, he gives it to her instead. However, when she turns it over, the back says "Fail," - alerting the host club it was all a trick to be allowed to visit Haruhi's house, showing the twins are pretty good actors, when pretending to have a fight. In the end Haruhi is allowed into the twins world!