This year Erina's sister is 7 years old. In Japan, usually on November 15th, girls of three and seven and boys of five and three are taken to the shrines by their parents to give thanks and pray for divine blessing. It is called "Shichi-go-san". It is a festival to celebrate the growth of children. Shichi, go, san means 7, 5, 3 resectively. Kaj and Andrea joined the festival.
Who do you know is the man behind the sisters? He is "Kan-nushi" san in Shinto attire.