0pen and jump out Trunks

It is the shape that an inside inner jumps out of a central slit in front.
The top and bottom of the inner is kept, but the side is not fastened.
This is done in such a shape to balance a feeling of fitting to a penis with the thing that I jump out, and しを makes better of the inner.
As for the inner, SMK cloth, the main body are MATT Ikuji of the swimsuit material.
I do not jump out that much only by having worn it quickly, and there is what gradually jump out while I wear it, and there is what I let I push you out of the beginning by hand and jump out and wear.

KH212　0pen and jump out Trunks

MEN'S UNDERWEAR SIXLINES