Don't Be Perplexed!! - S2.E6

After a week of training at Saichouji, Hinata and Ikkou are required to go into Danda Cave, one of the few places close to hell, to complete Hinata's training. Hinata manages to relinquish her ties to her demon associates, with exception of the little demon, for her sister's love. Worried about Hinata and Ikkou, the rest of the gang go to Saichouji to meet them. When Jotoku finds out that the girls have abandoned their chores, she gets Miyako to assign them chores, namely shell-diving in see-through. It is revealed that Miyako is Haruka's older sister.