1x5 - Merman in My Tub

A witch, a vampire, and a mummy... From the darkness, Wakasa, Takasu, and Mikuni appear.When Tatsumi sees Wakasa dressed as a witch, he wonders why. When Mikuni declares, "Trick or Treat," he realizes it's Halloween, but he tells the trio he has no candy. The watchful trio pounces on Tatsumi with a tickle attack! What will happen to Tatsumi? Will Wakasa and his friends acquire any candy?