Aihara Mei, a hardworking medical rep, hires a housekeeper named Shigino Nagisa on her 28th birthday. Tadokoro Yuta, enters Mei's life, creating a dynamic involving the three characters revolving around Mei's career and personal life.

Mei Aihara is single and works hard as a medical representative with a pharmaceutical company. Efficient at work, she struggles with housework on the home front. On the night of her 28th birthday, a stranger named Nagisa Shigino, appears on her doorstep. Claiming to be an excellent housekeeper, he offers his services to tidy up her messy home. Despite her misgivings, Mei ends up hiring him. Meanwhile, another stranger Yuta Tadokoro, a medical representative with a rival pharmaceutical company comes into Mei's life.