Umi Jigoku海地獄2026-05-06One of the school trip destinations in volume 8, "A Corner of the First Trip ①." "After eating lunch at the park, we really got on the tour bus with barely any sightseeing and began a hell tour. It's really called that." The hell tour mentioned here is the famous hot spring tour route in Beppu City, "Beppu Jigoku Meguri." Chapter 50 of the manga depicts three of the hells; this one is Umi Jigoku (Sea Hell).
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