Manga like this are pretty depressing to read when you've spent your fleeting high school years playing video games alone in your room EVERY DAY instead of trying out new things like this story's protagonist. I wish I did more exciting things in those days like play in a band, group karaoke, going to the beach, and ditching school to hang with a girl. I'm no longer a teenager, and I won't be considered "young" for much longer, but it's not too late for me to start "living". The only thing stopping me are my own do-nothing tendencies I've built up over the past decade.
I'm not sure if stirring up these feelings was the authors intention, but this piece of art made me realize something. I'm not stuck in a mystifying timeloop where I won't age, and that's precisely why I need to make the days count instead of counting them as they pass me by.