The editor-in-chief said to make an extra Obon-themed chapter, so that's what happened.
Hahari's set up a stall for the reader: Girlfriend Fishing. Rentarou is suspended from a crane (operated by Hahari) like a fishing lure with all the other girlfriends in a pool below. The prize for catching a girlfriend is getting to see them act all lovey-dovey.
Rentarou is lowered into the pool... and successfully fishes out ALL of the girlfriends at once! Hahari promptly jumps from the crane to join the pile.