This is Gunma's "Child-Treasure Miracle Hot Spring." This is the story of a couple who visit this famous hot spring, which has brought miracles to many couples struggling to conceive. An obscene closed-door drama unfolds, featuring a wife writhing and enduring the waves of rising pleasure, a husband sleeping while his beloved wife is being seduced right next to him, and a therapist who uses a "full-body" massage to precisely target the woman's weak spots!