I saw a brief recap video.
It’s an animated movie. It appears to be Japanese.
The recap talked about a young woman who had been living isolated in her apartment for three years, not seeing anyone in person. But she had an online boyfriend. And then she found out her boyfriend lived in the apartment below hers and was aware she lived just above him.
Just to be clear, it’s Japanese style animation? Did it look more like horror/thriller or comedy/romance?
Japanese-style but I could also see what appeared to be Japanese written text. That said, I don’t read Japanese so the text I saw could have been Chinese or Korean.
The recap I saw made the movie seem like a comedy/romance.
If you can remember any characters that looked like this or this, that’s Japanese and the movie should be listed here. Godspeed.
If you remember characters like this. That’s Korean and it should be on this list.
Otherwise, it’s Chinese and should be here.
This is all assuming those lists are comprehensive, which they may not be. Anyway, good luck.
I have a different movie I’d like to ID. (I clicked on this thread thinking it might be a generic thread for such queries. Mods: please transfer to better thread if appropriate.)
This is a British movie from circa 1999 (very approx); my synopsis might not be fully accurate. A journalist wants to write an article about single women who are hard-driving businesswomen. His friend advises something like
“Start with an individual and you end up with a type. Start with a type and you end up with nothing.”
(or some similar paraphrase of a quote by F.S. Fitzgerald)
So the guy picks a woman, breaks into her apartment, needs to hide in the closet overnight when she returns. While in the closet he observes her secret behavior: For example she gorges herself (on chocolate cake and/or steak?) then deliberately vomits. At the end of the movie he seeks her out, but she recognizes him as the intruder from the brand of cigarettes he smokes.
What was the name of that movie??
Sorry, can’t help you with that one.
My “need” to ID this movie was minimal before but, because I posted, might turn into an obsession. But I think it was a badly-received film and my chances of finding it are small. 
I’m trying lots of Googlings but have come up with nothing but what MIGHT be a request to ID the same movie I’m trying to ID:
https://www.reddit.com/r/tipofmytongue/comments/13m28qz/tomt_movie_a_man_hides_in_a_womans_closet_and/
I think I’d immediately recognize the film’s title, so I should be the searcher. I did skim through many dozens in Wikipedia’s British movie lists but to no avail.
Possibly it’s not British. Ireland, Australia, New Zealand, or even South Africa may be responsible.
I’m 96% certain it was English. I think the location was London.