Ishibumi is born and raised in the Chiba Prefecture of Japan. He is a big fan of Pokémon and has collected every form of Gundam merchandise, which he writes about in his blog.
This volume is another short story collection with tales that take place from before volume 1 through volume 14. The main difference between this volume and the previous two short story volumes, volume 8 and volume 13, is that volume 15 isn't entirely short stories. It takes part partially after the events of volume 14 and partially in the past. The setup for this volume is that the characters are discussing amongst themselves the events of volume 14 and what their next steps are, but while discussing they also begin reminiscing about the past, segueing into each short story.
There was zero forward movement in this volume as it consisted of mostly flashbacks. Nothing too essential, although it does include a moving father/daughter bonding scene.
It had some fun moments, but a very disappointing volume, though I'll will praise the author for using a story-within-a-story method (don't know how to say it otherwise).