This is the YG03 from I-Dream Co., Ltd. in Yokohama (One Brand). The YG03 being offered this time was discontinued some years ago. The fabric is slightly thicker than TM's Strike Skin, and stretches in a similar way to the old TM BFZ. As you know, even though it's thicker, it's still considerably thinner than most underwear on the market. As you can see in the photos, the upper part is made a little longer, and the design is meant to be worn tilted forward, gathering the front into a small, compact shape.