The first Nise Seijo book (English subtitle: You Wanted the Perfect Saint? Too Bad!) turned out far better than its synopsis would indicate. The reaction comedy is on-point, it’s not laden with fanservice, and there’s a nice mix of the protagonist’s actions backfiring in both expected and unexpected ways. Glad I decided to give it a chance after initially dismissing it.
Sadly, the same cannot be said for Mugen Gacha (massive title omitted). It is every bit as bad as its synopsis would suggest. This book is purestrain self-insert wish fulfillment in its lowest and most half-assed form: Little rhyme or reason to event developments, every single side character fawning over the protagonist like Diablo from Tensura, and zero justification for his instantaneous transformation from wimp to merciless incarnation of vengeance.