Konoha figures out the trick to time travel, and succeeds in going back to the past for the third time. But the winds of change are blowing in 1999, and Alcohol Soft is caught in the eye of the storm!

Konoha returns to the year 2023, but finds that the Akiba that she knows and loves no longer exists. With a middle-aged Mamoru as her only ally, can Konoha figure out a way to un-change history?