This is probably a stretch but I hope someone can help me because it's absolutely bugging me that I can't remember the name to these 2 songs.

The first song, I remember it was popular in the early 2010s, so I think it came out around that time. It's a sad song sung by a female singer which I believe it's about a breakup.

The most distinct thing I can remember is that the mv has her sitting on a train in the first few scenes.

The second song might be slightly easier. I remember the mv was quite lewd and it's from a pretty famous singer, also female. The girl is depressed over her breakup and her house is an absolute mess, there's insects and cockroaches lying around with uneaten food and all. Along the way she remembers past memories with the guy (and they're all quite suggestive). Then at the end I think she cleans the house.

Any help would be appreciated!