This story reveals more about our favorite Heavy Blade heaving airhead. An event was opened, and upon hearing about it, Mimiru jumps at the chance to share it with Bear. It Flashbacks to a story of a small girl, and a man, playing a seemingly unbeatable dungeon in 'The World.'
In it, a lovely character called Mimika easily destroys some of the impossible monsters. But than it gets harder as the dungeon deepens.
It is revealed that Mimika is played continuously by a team of three girls. (This may be considered as a cheat, but there is no rules against this.)
Mimika helps the young Mimiru save her friend, and it's ended with an ending so sweet it'll give you cavities. Appropiately, when Mimiru decides to pick up 'The World' again, she choses one similiar to Mimika.