Ah yes, classical shoujo development, Shitleil has been the most defective and vicious asshole on the planet, but strange wacky chtuluu forces forced his hand and he had no choices ! As such, Shitleil is actually a good guy, everything he did is forgiven and Illiya will get back with him at the end because why wouldn't she get back with the guy who got her killed many times and emotionally destroyed her.
I didn't forget you, abandonned empress, your ending is dogshit.
Anyway, sorry for the rant ^^',
Thanks for the summary tho, it helped a lot !
she doesn't get together with the sol ex fiance again tho. She legit leaves everyone behind after things wraps up to travel with crow, who we find out is like a super mage or something who travels dimensions and worlds just to find illiya. Sol regrets a lot but he ends up taking care of the younger sister like all his predecessors. The "original" sol did make very bad choices tho. And his taking care of Silvia is like his atonement to himself or something because that was the only thing illiya asks of him before she leaves