Sword Art Online - S03

Kirito wakes up in a huge, fantastical forest full of towering trees. While searching for clues about the truth of where he is, he meets a young boy who seems to know him. He should be a simple NPC, but his emotions feel no different from a human's. As they look for the boy's parents, a strange memory comes back to Kirito. A memory from his own childhood, of this boy and a girl with golden hair, and a name he should never have forgotten: "Alice."