Desperate Struggle Under the Moonlit Night, the Mysterious Assassin and Zanpakuto

Plot:

A mysterious team of three transfers into Ichigo's class. Their names are Rurichiyo Kasumiohji, Kenryu, and Enryu. Rurichiyo acts like a princess, and Kenryu and Enryu obsessively guard her surroundings. Ichigo is clearly suspicious of the three of them, but the rest of his classmates welcome them without question.