The Tanaka couple plan to set up a kiddie pool for their visiting nephew at their countryside home. To beat the summer heat, the family works together to assemble the pool. However, Mr. Tanaka gradually begins to feel uneasy—not because of the work, but because his wife, Yuki, is wearing a swimsuit and bra that clearly don't fit her slender frame, causing her bra to visibly show through. Her movements during pool setup and daily chores draw his attention uncontrollably, especially the way her nipples peek through the fabric, exposed and defenseless. As more men notice Yuki's revealing bra, they begin turning their eyes toward her vulnerable figure, eventually taking calculated actions that escalate the situation.