Marika works for a small advertising agency and is busy with hard work every day. Suzuki, a new graduate who works in the same office as her, also spent days as a company slave. The constant ringing of telephone calls, piles of documents, and the rigors of hard work that I couldn't even go home for 31 consecutive days ... And while working overtime at midnight, Suzuki loses his normal judgment and attacks Marika from hesitation. And again, Marika, who was on the verge of limit, drowned in pleasure as she pierced the back of the vagina for the first time in a while ...