Rin's husband is on a single assignment, and her son accompanies him, allowing Rin to enjoy the single life. One day, she discovers that Takuto, the son of one of her mom friends, is a coworker at her part-time job. Rin, who has been suffering from a sexless life, becomes interested in his robust body and secretly invites him for a drink... Since then, the two have been enjoying an affair limited to their part-time jobs, indulging in thrills and excitement during work hours, drowning in pleasure. And every time she punches out her time card, her body naturally begins to ache with desire...
