It's like a bland prototype of
Convenient Semi-Friend, the author's ongoing manga, which rehashes very similar character designs and personalities. The pretty art style stays. Convenient Semi-Friend has a deeper couple and an actual plot.
Read the real deal instead of this prototype unless you're here for fluff which is okay too.
Not sold yet? Now the shy assertive girl is a Hitori-like anxious gay mess who can barely tolerate slight touching but still shows a talent for seduction, and the athletic girl is a (lapsing?) player who is thrown off that she's suddenly feeling overwhelmed and submissive. The main couple was upgraded, which adds much-needed nuance to them being thirsty dorks.