oh man.. what a sucky ex.

No spilers just my opinion.
Her ex sucks ass..and so does the "original novel" of the manga.
Let me get this straight.
Fl is the saintess ment to go through hartship to develop and awaken the Hero's power and be saved. And said hero is her constantly cheating (but dosnt see it as cheating himself) boyfriend..
He openly lets women flirt with him, never turns down an invitation from the opersit gender, aloves them to kiss him and even aloved actions that reprecent love and marrige intent twards him, yet he expected Fl to just sit at home and waith for him like a loyal dog that forgives any wrongdoing on his part. In the original fl forgave him because he was always there to rescue her (like a prince charming) but the curentl FL dosnt wana do any of that shit so she dumped him.
Whent Fl dumped him and started dating, he was in shock!.(he thought she would come running back and beg to get back together)
Then Fl end up marrying the one she was dating, so he desided to show up on her weding day and confront her, and was creamed at for ruining the happiest day of her life. (He though his mere presense would change her minde and have her run back into his arms.)

Then he finds out Fl's husband MIGHT be a Demon, and that info is based on one knight who was found passed out's testemony and the ex is over the moon with happynes.. Because "she was just bewitched" so onece he kills the husband they will get back together. But at the same time, there was that one page where he went "if it turnes out she is with him out of free will, ill kill them both".. Like wtf dude.
Thats not love thats obsession.. Hove come you didnt give as shit about cheating when you were together but the second she is happy you wana destroy it all for your own selfish "needs". Even his fellow knights and superiors are notecing how blody unhinged he is.. like in the recent chapter. After being told Fl's husband is a demon, to literaly have an evil grin on your face..

I hope for the sake of the story, that the ex ends up getting repremanded and a treaty gets made between humans and demons because of Fl and her husbands love!