This VN is romance based, but it mostly shines for its depictions of teenage friendships and hardships. Many of the main characters experienced early life trauma, and are recovering together while working hard towards a common goal. Seeing a bunch of broken misfits come back to life while working on a puny plane just works... well, surprisingly. Bonus point for having a protagonist who has a real story, and who is not a creep or a doormat. The story itself is a little over the top, but it's alright if you embrace the Hollywood-like cheesiness. This is a feel good game, after all.
The concept artists did a wonderful job, Kazegaura feels like an unique, vibrant place that you'd like to visit. I think this is a very important piece of the puzzle, this is a long game, and it has the chops both in terms of art and story to keep you immersed for a long time.
The game is, still, a little harem-y and trope based, but nothing too dramatic.