The Fortieth Floor of the Tower. The tests given on this Floor are currently unknown. The sky appears to be cloudy at times. The Mushroom Farm, the fourth station of the Hell Express, is located on this Floor.
- ↑ Vol.2 Ch.225: 39F - Hell Train: The 'Name Hunt' Station (28)
- ↑ Vol.2 Ch.230: 40F - Hell Train: Wangnan (5)
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