Thread of Light (Season 2, Episode 15)

17th episode of Mushishi zoku Shou.

Plot (Spoilers)
A woman and a man are talking and observing the stars. The woman sees a a glowing thread hanging from the sky, and reaches for it. She suddenly disappears, leaving the man to search for her.

Ginko is wandering through the forest when he sees a woman floating in a tree. She has been turned into a Mushi and has floated up. Ginko brings her down and gives her medicine to return her physical body. When they reach a village, the man runs up and hugs the returned woman. They eventually decide to get married. A few months later, Ginko returns to the village and finds that the woman has disappeared once again. After deciding to get married, the father of the man says that he will not support the marriage. The son has doubts about his wife's humanity as she sometimes floats back up to the ceiling. Eventually, the woman finds it harder and harder to remain on the ground and finally floats away in front of the whole village. Ginko tells the man that the girl remains in the house and is in fact looking at them, holding on through her love for the man. The only way to bring her back now is to hold the wedding ceremony and make her feel welcome. The young man holds the wedding, and many regard him as insane due to the perceived lack of a bride. He lives on the outskirts of town as an exile. However, as time goes by, people begin to see his wife.