Astarotte no Omocha!

After waking up, Lotte discovers the leaves from the world Tree have changed color, and she also has a small mark on her back the same shape and color as a World Tree leaf. She is told it's a sign that she will soon have her wings starting to grow. Everyone is happy as it seems she is starting to become an adult. Judit tells Naoya that it is time for him to do his 'job'....for him and Lotte to have their first 'suck-off' session (I kid you not), and not for anyone to disturb them. Soon after Naoya has a pain in his chest and shortly after, his daughter experiences the same thing. The Sage Inni discovers after doing some research on the World Tree Yggdrasil, that it is emanating too much magic and is trying to eliminate anything that is foreign to the monster world, which means it is trying to get rid of Naoya and Asuha! While everyone is discussing how to deal with this urgent matter, all of a sudden Lotte can no longer hear Naoya or Asuha, even if they are right in front of her or her staff. So Naoya decides in order to stop all this from getting worse and affecting Lotte, decides to pack up and return to the world of Man. Lotte and company decide to have a going away party for them. Even though they had a lot of fun times, Naoya can see that she has feelings for him. The one who is affected the most by this sudden departure is Asuha, who starts to cry after she gives a present to Lotte. Olav makes a remark that the two girls are really like sisters, which is correct if you read the manga. The episode ends with Lotte telling Asuha that she will never forget them, as she tries to wipe Asuha's tears away.