I'm gonna be honest, the whole plot is very interesting but the way it run (idk how to say it but) looks like it's being made by a child, someone who is too afraid of bigger conflict. The tension and all just for it to be revealed like that, I thought the story is a more serious one. There's way too many plot holes as well. The writer is not great at capturing the world where this story sets.
But this is still an amazing work, especially if you don't want something serious but simple. It has a very cute art style. Both Kansei and Shou loves each other so deeply and willing to sacrifice themselves for each other. It kinda reminds me of how much I love my siblings.