I haven't read the prequel, Koukou Debut, but I read this on a whim. It's bad. It's really bad. The Manager is one of the most annoying non-MC aholes in a oneshot, so much so that I had to skip most of the pages to avoid reading what he was saying. Actually, I didn't really even have to get to the end since, after a certain event, it was so painfully obvious how things would turn out. Perhaps this was simply an exercise by the mangaka to make an incredibly annoying character.