This feels like a super budget manga. Lots of panels with no or barely-detailed background, hands without fingers, characters with very simple designs - there's even a completely white panel with just dialog bubbles on page 25. Also, characters are way too pointy, like their chins or elbows, but we could chalk this up to style.
Given the artistic limitations, I'd expect the writing to be a bit more interesting than a otaku x gal + idol story. Most interesting part was the waitress fist-pumping at the idea of walking into a couple having sex in the booth. Change the story to be about her and her hobby of trying to walk-in when couples are getting busy and my interest would be actually be piqued.