Hello everyone!

I’ve been searching like crazy for this drama that I saw (I believe on Amazon Prime Video) years ago. I believe it was a Chinese Drama. 

It was about a woman who lived next door to this other woman who had sex with a lot of different men. The main character would always be watching from her house. She doesn’t have sex with her husband and is lonely. She works at a grocery store. She meets a teacher and develops feelings for him and eventually begins to have an affair with him. She finds out that he’s married as well. In the end, the teacher chooses to stay with his wife and I believe the woman’s husband leaves her. I want to rewatch it because it was so good but I can’t remember what it’s called and I can’t find anything online about it. Could someone help me out?

Thank you! :)