PROBLEM TO BE SOLVED: To enable male external genitalia to become inconspicuous.SOLUTION: A first end 21b of a cylindrical storage part 21 with elasticity is provided on an inner surface of a rear body part 12, near the center of the rear body part 12 and near a waist opening 14 so that a central axis of the storage part 21 can be positioned along a central axis of a body 10. In addition, a second end 21c being an end on the opposite side of the first end of the storage part 21 is an opening, and its diameter can be changed.SELECTED DRAWING: Figure 3
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