Naze ka S-kyuu Bijotachi no Wadai ni Ore ga Agaru Ken

"I think I've met The One.”
”I also have a regular customer at my part-time job that I kinda like...”

High school girls Sara Himekawa, Rin Kohinata, and Yuna Takamori are called “S-class beauties,” admired by everyone for their unparalleled beauty. While the school is abuzz with questions about the mysterious guy that the girls are talking about, Haruya Akasaki, a quiet boy in the class, is feeling anxious. In fact, the subject of the girls' talk is Haruya! He definitely does not want to draw that much attention at school, so he tries to make the girls lose interest in him, but it all backfires and…

This is a school harem comedy between a plain guy and “S-class beauties."

(Source: Kadokawa, translated)