Mugen Garan

A British army captain is captured by a Hindu ruler named Bimbisara, who chooses to teach him the Kama Sutra through direct experience rather than executing him. In another story, a student named Kazamatsuri falls overboard during a school trip and wakes up trapped in an unfamiliar place by someone who has never heard a human heartbeat. He is told he is in the netherworld and will never escape.