OC Tsuga concept #2 (NSFW)

In the society of Nui there're no sexes. There're only Pure and Distorted. Pure are the ones with 2 pairs of reproductive organs (for example Tsuga, who's pure). They're extremely fertile, but born quite rarely (98% of all Nui are born as distorted). Pure are considered as diamonds of the society and are treated quite well (even as Yave, which is the only exception for them to not to do dangerous work or become a test subject).

The distorted ones are intersex (both vagina and penis) or the ones without any reproductive organ, therefore with low fertility or non-fertile at all. They can give birth only to another distorted (tho it's a low chance even to give birth, cuz mostly they bring stillborn) and only pure can bring another pure.

Scientists discovered that the fault of such low fertility of the distorted is a mutation appeared due to harsh climate of the mountain, because years ago there weren't distorted at all and the pure ones weren't neither called "pure" nor considered as something rare, they were just normal Nui.
Unfortunately, science can't fix this problem genetically, so the society created special rules for the pure. The most important is that they must mate as often as possible, castes aren't important in this case (the kid usually takes the lowest caste of 2 parents). 

So Tsuga is one of the pure males, tho he had no will to mate with anyone (he was quite young when they started to demand it from him and the first mating night was so horrible and disgusting for him that he refused to do it). Even for the sake of his people.
He tried to talk to the head of the caste saying he wants to dedicate himself to science, but was refused and sent home. Desperate, Tsuga tried to sterilize himself with aether (the magic I explained about in Echo's concept), but he was found before the process.

Sterilization for a pure is a crime (the pure becomes one of the Yave), so even an attempt is punished. The head of the caste gave a chance to Tsuga instead of expelling him. So Tsuga was thrown in jail till he changes his mind (they gave him a condition that if he accepts his role as pure, he will get everything, but if not, he will suffer and become Yave). Tsuga preferred to suffer. He was kept in cold and constant hunger, so slowly but surely he was going mad about food. The head of the caste visited him regularly, trying to talk to Tsuga, but everything Tsuga saw was the fact that all these Nui around consist of meat and flesh he could eat.

And one day when the head of the caste decided to take him out of the cage, Tsuga attacked the jailer that was opening the door. He managed to kill him instantly and ate his flesh before he was rendered harmless by the guards.

Btw this piece is when Tsuga eats the corpse and realises what he's done. I will explain the consequences in the concept #3 c: