Karen Ichijou Tempts Him / 一条かれんは誘惑する
Rank: 1213th, it has 2416 monthly / 31994 total views.
Authors: Fujitani youko
Genres: Japanese , Josei , Comedy , Romance , School Life , Slice of Life
Release status: Ongoing
From cotton candy scans:

"At 17 years old, we’ll have our first…” 
Karen is head over heels in love with her childhood friend, the brusque and fierce-looking Mii-kun. Day after day, she makes amorous advances toward him in hopes of making him her future husband. But when it’s just the two of them, she can’t help but feel a little nervous…? 
She’s a headstrong queen in front of everyone else, but when faced with the boy she likes, she can’t help but turn back into a blushing schoolgirl?! A youthful love comedy that will make your heart pound! ♪
Click on the mangaka’s name - this chick is all about some yaoi 🤣