ウバールの悪魔（上）シグマフォースシリーズ0

The mix of historical secrets and contemporary action kept me on the edge of my seat. I'm curious how much research went into crafting this seamless crossover.

The story moves so quickly that I found myself racing through chapters — was that the intention or just how the story naturally unfolded?

Their diverse histories added depth, but I wondered if the author intentionally used their backgrounds to drive the plot forward or to explore themes of identity.