Mushishi Zoku Shou EP1 - Banquet at the Forest's Edge

A sake brewer once lost his way home and chanced upon a strange ceremony. There, he tasted a sweet, glowing sake that he's never been able to forget. Years later, his son has followed in his footsteps and is trying to brew a sake to match his dad's. When he, too, encounters a late-night ceremony, he pretends to be part of it, meeting Ginko during the occasion.