トンネル 下 (Tankobon Hardcover)

The underground world adds an exciting layer of mystery and danger. I'm curious if the author based it on real places or pure imagination.

The constant sense of danger kept me on edge, but I wonder if that was the goal — to make every discovery feel like a risk.

The book has tense moments but also funny exchanges. I’d love to hear opinions on whether this mix kept the story engaging without feeling uneven.