Ren bites his lip for a moment—an old habit, recently rediscovered—then lets it go. Regardless of whether Akechi remembers doing specific tasks on the 1st or not, it's obvious something has been put in place as a substitute for his detainment. Which is probably true of anything Maruki doesn't want Akechi to remember.

So Ren presses a little harder. "What were we working on in January? You and me and... our friends?"