"Where... is this..." When he realized it, Kirito somehow got stuck in a huge fantasy virtual world. His memory before logging in was vague, so he had to wander around looking for clues. After that, he came to the dark giant tree "Gigashi Cedar" and met a boy. "My name is Eugeo. Please take care of me, Kirito-kun." The boy is a resident of the virtual world - an "NPC", but he has "rich emotions" like humans. While deepening his relationship with Eugeo, Kirito was also trying to find a way to log out of this world. In Kirito's mind, a certain memory awakened. It was the memory of Kirito and Eugeo running in the mountains when they were young - a memory that should not have existed. And in that memory, in addition to Eugeo, there was also a figure of a blonde girl. Her name is Alice. An important name that should never be forgotten.