Rain and Underwear

In Japan, there is a saying, "Hide your head, but don't hide your butt," which means that even if you think you are hiding well, your important parts are still visible. I think that underwear symbolizes the real you, which is not usually visible.

On a strange rainy day, the everyday scenery may be washed away, and the inner hearts of various people and monsters may come into view along with their underwear.