Right near the end of the Kumagawa Incident arc, Kumagawa tries to get his original minus Bookmaker back. In exchange for this, Ajimu takes his current minus All Fiction from him. Meaning that from that point until Ajimu returns it, Ajimu has All Fiction.
That's both a mistranslation and a misinterpretation.
The translation essentially said "But to give you Hundred Gauntlets back I had to take your All Fiction in exchange." The translators clarified at the start of the next chapter that they meant to write "Bookmaker" and not "Hundred Gauntlets". And even within that mistranslation, she didn't take Hundred Gauntlets from Kumagawa, she took All Fiction.
And following from the plot of the series, at that point Kumagawa was going to Ajimu to trade his All Fiction for his original minus Bookmaker.