[DeepL Translation - needs review] Demons eat, shuras slay, and people live. That is the destiny. Sad and mysterious, the fate of this world.... Hou, the strongest Shura, meets a girl in a scorched village. The girl is Yomyo. She has the blood of an ogre and the power of an ogre, "Onikai". Hou sets out on a journey with Yoruami. The journey is endless, like eternity. However, the "time" that had been sealed away begins to move as the demons that seek Yoruami's power begin to attack.... A run...
This is a properly weird book. I mostly enjoyed it and it scratched a particular itch I have for fantasy that doesn't explain itself, but also I don't think I'd recommend it to anyone necessarily. It's awkwardly paced in spots and outright confusing. It's hard to say if there was any real point to the story.
It's also hard to say how difficult it is. Some parts are very easy, some parts are not - but it's not generally because of vocabulary (though it's got some very rare words) or grammar (though the grammar is intentionally obtuse sometimes and often old-styled), but that it quite regularly just drops significant sounding sentences with zero context and leaves you to piece it all together later.
Buut, it also has an interesting vibe going, that's rare and feels fresh. In a sea of bland fantasy stories it sticks out for trying something different. Might be worth trying if you have a tolerance for ambiguity and like atmospheric/vibes-driven fantasy, but this four star rating is very much "I thought this was really cool but also flawed" not "I think this is an objectively great book".