It's "A man of concerns", arranged in 3 versions.
The first one is "The original ver."
The second one is "Re-harmonization ver."
The third one is "8-beat ballad ver."
I left the link down there. So please check them out.
[The original ver.]
https://www.youtube.com/watch?v=OhBbnaaLJGA&feature=emb_title
[Re-harmonization ver.]
https://www.youtube.com/watch?v=pN1J1fmf_KU&feature=emb_title
[8-beat ballad ver.]
https://www.youtube.com/watch?v=wMuDTbMV4xA&feature=emb_title