Review Detail of Akira_Kei_ in The Collapsed World

The author here trying my hardest, (rating is done randomly) i want to recommend everyone reading my book (of course because i love my own book and i want more people to see.) i know in the first few chapters the MC might look like he cares a bit too much about his sister but it is a main motive to drive him into the world. if it feels a bit too obvious or repetitive I'll try and eventually broaden his motives (please keep hanging on, this thing gets better.). I'm sure it won't feel boring since it is a huge mesh of genres. I hope more people to come and leave a review. it'll help my understanding about what the readers want. I'm also open for criticism and ideas.