I don't understand why people are so upset that he's killing "innocent" humans. He's killed countless monsters but they don't matter because they aren't human even though the monsters have the same amount of personality, feelings, and even families as the humans do. The MC has even shown character development; when he was going hunting often his first kids were born he left the pregnant bear and her mate alone, when before that he would kill everything he came across in order to soothe his hunger
SPOILERS
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The ice wizard gives the rain princess the cloud but it rains down the citizens greed. After they leave the fire magician enters the castle to try and convince the ice wizard not to help the ice princess. By complete accident chef kills the fire magician and his power is passed on to chef. Ice Wizard trys to keep chef from figuring out he's turning into new ice magician. Chef finds out about becoming a wizard and ice wizard realizes he's in love with chef. Ice wizard starts cracking and the only way to save him is to melt and refreeze him. So chef completely becomes new fire magician and saves the ice magician. Chef has to leave castle because he is too hot and would hinder ice magicians healing. Ice magician wakes up with only bits and pieces of his memories and thinks that chef was a thief and wants to find him. Chef is doing fire magician stuff in the desert somehow finds his way back to ice wizard, ice wizard gains his memories back and they live happily ever after.
There is no explicit sex in this but there is a few kisses and moments of the ice magician being clingy and cute. And there is more backstory on who the chef and ice magician are and how ice magician became a magician that I don't feel like typing out.
Overall... cute story with beautiful art 9/10
Condolences to you and their family and friends