Yamenaide, Sayama-kun

Sayama is a new employee who works overtime everyday. He's completely drained both physically and mentally with no time for romance and is considering changing jobs. After a devastating day, he returns home to find a drunken man laying on his doorstep? He takes a closer look and realizes this man was Kounoki, the president of his company!
Without a choice, he takes the drunken president in and looks after him. However, he eventually considers this to be a perfect opportunity for him! Sayama tries to collect information on Kounoki's weaknesses to get rid of his demonic boss's attitude by persuading the president, however…

(Source: Kadokawa, translated)

*Notes:
\- All chapters were split into two parts in the original serialization and later combined in the volume release.
\- Includes one extra chapter.*