A virtual multiplayer online role-playing game called "The World" exists. Within "The World," an event takes place in the Dungeon of Nankoflank, which Mimiru, a character in the game, undertakes alongside Bear, another character. Mimiru tells Bear that she is not doing the event for the treasures or experiences, but for the memories and experiences from when she first started playing. The two later encounter a certain character named Mimika, and together, the three proceed through quests and events as Mimiru learns the meaning of the game.