Marika works at a small advertising agency and is busy with her daily work. Suzuki, a new graduate who works in the same office as Marika, is also spending his days as a corporate slave. The phone never stops ringing, the paperwork piles up, and the harsh work of not being able to go home has led to 31 days in a row... Then, while working overtime late into the night, Suzuki loses his sense of reason and attacks Marika in a fit of madness. Marika, who was also on the verge of breaking down, is penetrated deep inside her vagina for the first time in a while, and she becomes completely immersed in the pleasure...