Lust Between the Lines

背徳の山開き 卑猥に湿って (original title)

Synopsis

Yuki, an aspiring erotic novelist, hangs out at the bar where her friend Kengo is the manager. One day, Nami, the mistress of Kengo's father, who died in a mountain accident, shows up. Nami invites Kengo to the mountains and they become engrossed in their lust, but...