Nurarihyon no Mago EP10 - The Demon Mirror Devours the Fruit

When Kana was six she looked into a mirror possessed by a youkai that promised to take her away on thirteenth birthday. Kana gets trapped in the mirror world but is able to tell her friends about her predicament through a spirit doll that was a gift from Kiyojyuji. Rikuo manages to save Kana at the last minute. Kana on the way home now in love with Rikuo night version wants more about him. He takes her to a youkai hangout. In the morning Kana asks Rikuo if the night version is his friend.