In a bustling office setting, the tension between two long-time colleagues reaches a fever pitch as a surprise pregnancy brings their past conflicts into the present. Hibiكي, a dedicated employee, finds herself in an unexpected situation when she discovers she's pregnant with the child of Yuusuke, a colleague she's been intimate with for some time. Their relationship, once a quiet secret, now becomes a topic of conversation in the office, especially with the arrival of Keita, Hibiки's former boyfriend and Yuusuke's rival.
Keita, still holding a grudge from their past, returns to complicate things further. He insists on making his presence known, even going as far as trying to rekindle his connection with Hibiки, all while challenging Yuusuke’s position in her life. The office becomes a battleground for their competing affections, with Hibiки caught in the middle, trying to balance her work, her relationship with Yuusuke, and the new life growing inside her.
As the days pass, the pressure mounts. Hibiки's bond with Yuusuke grows stronger, especially as the physical and emotional connection between them deepens. Despite the chaos, the love between them remains clear, even as Keita's attempts to win her back grow more intense. The office becomes a stage for their passionate encounters, where every glance, every whispered conversation, and every touch adds to the growing tension.
Amidst the turmoil, Hibiки finds moments of solace with Yuusuke, who supports her through every challenge. The bond between them is not just one of love, but of understanding and shared experiences. As the story unfolds, Hibiки must decide where her heart truly lies—between the past and the future, between Keita and Yuusuke, and between the life she's built and the new life she's about to welcome.