
Have you ever feel a story is so cheap? Or amateur?

I think that from the perspective of being an amateur and this was one of their first works, you notice that they really put in the effort to establish the psychological impact when you, as the reader, invest into the story. I myself notice errors here and there that were confusing. But, overall I'd give the author praise for being able to emotionally involve the readers in their first works. It shows that they're capable of incredible storytelling if taken time to polish and grow in that skill or talent.
I fucking hate everyone in this manga...