Berserk: The Golden Age Arc I – The Egg Of The King
When she was young, Hotaru was once lost when she played in the forest near her uncle’s place that she visits every summer. There, she had a fateful encounter with a spirit, who helped her even though he would disappear if a human being touches him. She began to visit him every summer, even as she grows; while he waits for the summer to come, for their time together to flow again.