In which episode did Little Bird discover that Haneoka Meimi was a holy girl?

Episode 35: Send the white dolphins back to the sea.

When visiting the aquarium, Asuka Daiki suddenly felt that Yamei was very similar to the Virgin Mary. Later, Sheng Liang learned that the curator of the aquarium had broken his promise to a child and didn't send the white dolphin back to the sea after curing its disease, so he asked the holy girl for help. The virgin finally let the white dolphin listen to the child and jump in front of everyone; But at this time, Asuka Daiki said something amazing. ...