Ai ni Naburareru
Complete | Honjoh Rie | 2000 released
I wish it had a few more chapter or they didn't put the other couple in it felt kinda random and things with the main couple felt really rushed I really liked how it started so I'm a bit sad but if you're into people watching while you do ecchi stuff and similar things there are scenes like that it's not horrible so dunno read it if you want
Charao-kun to Haraguro-kun no Himitsu