I enjoyed playing through this game. The beginning started off a bit slow, but I'm glad I stuck through it until the end. Are you a fan of games like Catherine or Persona? I felt a bit like I was being reminded of the themes from those games as I interested with Nagi and read through Ayumu's thoughts.
When I was younger, I had quite a bit of depression that made it hard to produce anything and I read a lot of visual novels in that time. Your story very much reminded me of the type of visual novel I really enjoyed at that time.
I don't know if this is the kind of story anyone could love, but I really liked it. It feels genuine and filled with lively writing that seems real. Ayumu's struggle seems real. I never want to return to the days where I felt like him, but it's fantastic to see someone write out how it feels to struggle through the endless nothing of depression for months on end. Well done!