chahorsecha

Looking for a manga it is set in zombie world is bl/yaoi is like rainbow city but it is were the mc wants out of the underground wants to explore outside faked being low grade not smart as the smart ones get kept inside the ones that fight zombies are genetically modified and live shorter lives and saliva can heal other people and the mc has high possessing power the mc's crush helps him out of his mind after he piloted plane solo and was hacked

Please help really want to find a manga some what similar to this but it is about a boy that was poisoned by step mother (who we find out was a demon later) his father is a duke that hates him people think he is weak his step mother teleports him into monster infested forest telling him his father hates him he is half dead a slime comes near he eats it on instinct everything he cooks gives him skills or power ups he meets a wolf lion like creature at some point when he is old man he kills and eats a dragon saying will my father acknowledge me now next morning he wakes up as a child along with the wolf lion creature he gains immortality he is 300+ year old man in a small child's body still cooking he meets adventures feeds them helps them get a sword that was stollen by bandits from a elf noble they take him in were he finds out his father the former hero betrayed humanity sided with demons so his last name is not a welcomed one but as he was abandoned before betrayal the elf family does not hold it against him he cooks for the family and other nobles during a party he also helps the elf mother be healed from same illness he had (poison) by eating dragon meat and that very dragon sets with them to eat her own tail that is all I remember