Keiichiro Ohchi is a Japanese screenwriter known for his work on a wide variety of anime titles. Most recently, this includes writing the script for the anime version of "The Quintessential Quintuplets".
Some of his other well-known works include:
My Teen Romantic Comedy SNAFU [Oregairu and Hamachi] (2nd & 3rd seasons)
The Quintessential Quintuplets (1st & 2nd seasons, and movie release)
The Demon Girl Next Door (1st & 2nd seasons)
Adachi and Shimamura
The Angel Next Door Spoils Me Rotten