Buchou to Shachiku no Koi Modokashii

An office romantic comedy about two people who have completely different work styles and way of thinking.
Mayumi Maruyama devotes his whole life to working in the sales department of the company and works overtime every day. One day after an office party, she spends the night with the director of the department and falls in love with him. But the next day she is brought back to reality by the words: "We're adults, aren't we?"
Based on the manga of the same name by Shimo.