Watashi no Kaseifu Nagisa-san

Aihara Mei 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 Shigino Nagisa 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 Tadokoro Yuta, a medical representative with a rival pharmaceutical company, comes into Mei`s life.
(Source: AsianWiki)