Dam
A woman is making a dirt cage in the sun. She's using it to trap water, making this a dirt dam. If you think about it, dams are just dirt cages anyway.
Picture the woman working tirelessly in the hot sun, moving and shaping the dirt around this river into a dam to make a pond.
えん
せき
None
Something about the woman working hard to build this dam makes her super sexy (せき) to you. Maybe it's because the sun is so bright, making her shine, or maybe it's because hard work is attractive. Who knows.
If you wanna be sexy maybe you should build a dam too.