Gin's parents abandoned him in the forest when he was just born. He was wailing in the forest, attracting the attention of the Yokais that lived there. Seeing that Gin was a harmless soul, the Mountain God decided to save his life by casting a spell on Gin that would maintain his body and that he would age a quarter slower than a normal human would. However the spell comes with a cost - if Gin comes into physical contact with humans, the spell would obliterate, causing his body to disappear. The forest lord (Yamagami) gave a mask to baby Gin so he would look more like a spirit, hoping to have him feel like he belonged.
Meeting with HotaruEdit
Little Hotaru is lost in the forest during summer when visiting her Uncle's home. Alone and frightened, she cries, attracting Gin's attention. Gin comforts Hotaru and they quickly become friends. Gin helps Hotaru by leading her out of the forest back to her searching Uncle.
Waiting for SummerEdit
Hotaru can only meet Gin during the Summer, when she stays at her Uncle's house. During the other seasons, Hotaru has to move back to her original home away from the forest. Gin waits for the summer as well as Hotaru, as it is the only time the two can be together. Hotaru always comes back to the forest every summer to visit Gin without fail. Their bonds grow stronger and they grow closer with each passing Summer.
A Precious HugEdit
Gin takes Hotaru to the Yokai Festival of spirits. They are walking together when a human boy who sneaked into the Festival rushes past. He trips and nearly falls. Gin catches him and prevents his fall. In the process Gin touches the boy, not knowing that he is human. The magic which preserves Gin's body is obliterated due to the contact and Gin starts to disintegrate. Knowing that he has mere minutes to live, Gin calls Hotaru to him. Hotaru falls into his arms, Gin getting the chance to finally hold her. The embrace briefly, both just happy to be in each others' arms, until Gin dissolves into light particles and Hotaru is left hugging the yukata that he was wearing as she falls to the ground. Hotaru cries. The Yokais that protected Gin thank her because she gave Gin happiness and fulfilled his wish, which was to touch a human. Hotaru keeps Gin's mask which serves as a reminder of Gin's existence.
Gin is somewhat of a ghost, he isn't exactly human or a spirit. Due to the Mountain God's spell, Gin ages four times slower than a normal human.