A good, original start
First of all, I really appreciate the creativeness of the plot. However, the way you write as of now makes it a bit confusing and difficult to read. But that's okay! You can always get better at writing, you have the most important part down, which is your imagination- which honestly a lot of people are lacking these days. You might want to add to your summary, it is intriguing, but, I didn't understand how it applied by reading the first chapter. You should let readers know what to expect and provide some clarity. I have some recommendations when it comes to writing style and grammar: "...as the lights are piercing into his eyeballs, [inflicting] a burning sensation." "...throwing them in the air, showering himself with the [OMIT: grass'] fragrance." (since you already mentioned he likes the smell). "...a gust of strong wind blows [past his cheeks] and the [blades of grass that were once soft seem to become real knifes, grazing] his skin." "There had always been a breeze, or so he [thought]," (you can use past tense here because it pertains to a breeze that occurred at a previous time). I noticed words such as "abruptly," "expanse," and "huddle(d)" used multiple times in the same few paragraphs. What I like to do is note this and either google synonyms or think of a replacement, such as: "Annoyed, he turns over, away from the sound, and [curls up]." Also, author's notes distract from the story, I would implement them into the story itself, ex: "...I just mashed up [some Graya,] and asked the neighbors for... seasoning." Graya is a slightly salty, starchy vegetable that grows naturally in seawater." And it would be better not to mention what "kapa" means, and just imply it with the girl's body language and how the other character's react to it. I made a lot more notes, but I don't think I'll have room to put them here, lol. So, if you want more help I would be happy to chat through something like Discord. Other than that, good job! It gives me vibes of an anime movie called Patema Inverted, you should watch it if you haven't, I watched it on animedao.com which is free.
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