I recommend also reading
Yuuutsu-kun to Succubus-san
It also deals with depression. Is surprisingly well handled despite the title. Like, it's mostly a comedy, but it never jokes about depression itself.
One of the high key elements is perception of good and bad by society. Which is why the person helping him is a succubus, a devil. She tells him to quit his job, make "me time", etc, things that are seen as bad in Japanese society. An angel shows up later and she represents the well meaning but misinformed people, so she thinks saying things like "try harder" and "you can do it if you just try" actually help.