Gin-san's invited to a Joi Rebels reunion, where he finds Katsura and Sakomoto, fellow survivors of the Joi War era, reminiscing about the past. Sick of seeing them in OPs and EDs all the time, Gin-san tries to leave immediately, but he's shocked by the revelation that the organizer of the reunion wasn't Katsura or Sakomoto, but rather the phantom fifth man, Kurokono Tasuke.
540 divided by 5 is 108 yen, and 
4,500 minus 108 is 4,392 yen, right?"
قسمة 540 على 5 تساوي 108 ين لذا إن
 طرحنا 108 من 4500 ستبقى 4392، أليس كذلك؟
540 dividido entre 5 da 108 yenes,
540 dividido por 5 são 108 ienes, 
então 4500 menos 108 são 4392, né?"