Read Manga

I was addicted to manga for about 3 years. In my first discovery of manga(online) I could read 400+chapters within 2-3 days even in schooldays without fail but as years went by I was slowly losing interest as it was quite hard for me to find ones that i liked. I still read it but just because I have nothing else to do(self quarantine days) . So I just wanted to know for how many years were your addiction of manga lasted?

Someone knows the manga that goes on in high school, the girl is having sex in a room on a high floor, then she sees her friends leaving and waves, they wave back, and the guy who is having sex with her says she got tighter ... (=・ω・=)