Yui, a shaved mother-in-law, has become addicted to exercise. She says it's to tighten her flabby stomach, but Toshiya expected that she'll get tired of it soon anyway. However, when she went to see how it was in half a joke, there was a strangely disgusting figure of Yui with a sweaty body. Perhaps, Toshiya gets lustful at her sweaty appearance. She sweats down her nape and down her cleavage…. Toshiya, who can no longer suppress her excitement, involuntarily reaches out to her crotch.
