
https://m.youtube.com/watch?v=nHONksx5R_0
https://m.youtube.com/watch?v=XeMGDN9kAYQ
https://m.youtube.com/watch?v=Fo1FI5E6HuM
https://m.youtube.com/watch?v=qqAFtZ8sgUM
https://m.youtube.com/watch?v=PBiqMzyGJJk
https://m.youtube.com/watch?v=NCaH-qqTWpk
https://m.youtube.com/watch?v=fuQAHIC_bbo
This is the most I could think of, hope you enjoy (≧∇≦)

I really like Jelly song from DRAMAtical murder
https://www.youtube.com/watch?v=UQfDhTYu4Gg

Oh wow! Never heard this before. It's wonderful! Love it already. Thank you!

Σ(゚Д゚) So many songs! Thank you Aisaku!

Thank you! I've already heard this before! But it's still great!

Thanks! I've heard this before! It's still great!

Oh okay I will! Thank you!

Bless this question. I got to see what the others wrote... perfect for reading manga. And just beautiful in general. As for something with voice...soothing, calm, depressing but calming, where u can hear the vocals and not a machine... check out cho kyuhyun's osts or solo songs.
https://www.youtube.com/watch?v=MoRpxCCI4xI
https://www.youtube.com/watch?v=Wek1pOnAqE0
https://www.youtube.com/watch?v=X_yK9SmnkZc
https://www.youtube.com/watch?v=RFmupNFbfhE
https://www.youtube.com/watch?v=EEuJqWhRRWY
https://www.youtube.com/watch?v=XZRp0nXvj8g
(the last two are more upbeat)
Now more in relationship to this page (aka manga and stuff), this death note ost from one of the musicals is super nice (misa ost)
https://www.youtube.com/watch?v=xUUkUwEBPRo
These are less what you asked, but from the same musical and super awesome, just if other want to check it out
Light's ost https://www.youtube.com/watch?v=-W2FvV2hJNo
L's ost https://www.youtube.com/watch?v=Uh4bU40-jjA

all of studio ghibli

https://www.youtube.com/watch?v=KfIq6HMYuvw cause I'm a tweaker. and I can't help it

aaaand again https://www.youtube.com/watch?v=cI0wUoCLnLk you may be familiar with this already :P
I know this is weird but I want to know your favorite song (instrumental or singing) that's soothing or calm, kind of depressing but happy at the same time. Or a song that's upbeat and happy, but not too happy. I don't like dubstep or songs that you can obviously tell was made by a machine (like electronic, Vocaloid is okay). Because I love those kind of songs but keep listening to the same song over and over already. Thank you!