Ben No. 28, Who "died" unexpectedly, traveled to a different world and began her adventure, but gradually everything seemed not to be simple...
During an ordinary trip to another world, why did Ben find her in advance on the 23rd and 31st?
Was this time travel an accident or was it planned?
Why is it that Ah Bing, who finally met her, is about to send her back to her original world?
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.