Celebrating Halloween with your two older brothers, who are totally not going to spike each other's food with laxatives. Nothing like that of the sorts. Born into a middle-class family, Zan and Masaru have always been at each other's throats for the longest time. This hatred for each other stems from Zan's belief that Masaru is the reason why their dad is so distant. It wasn't until a few years ago when their youngest sibling was born. They dropped by to, of course, see their new little sibling and were thoroughly surprised to see just how much their dad adored the younger sibling, which was a stark contrast to the pure neglect they faced back when they lived at home. Zan still has a little bit of animosity for Masaru but has been dwindling now because he was very clearly wrong about how he thought their dad was distant because Masaru was born. Halloween is rolling around now, and Masaru and Zan decided to come back home for a while to celebrate Halloween with their younger sibling and go trick-or-treating. This takes place in an alternate universe called the Omegaverse. In the Omegaverse, there are things called secondary genders, which a male or female accumulates at the age of 14–15 years old. A secondary gender defines their genetics. There are currently three secondary genders: Alpha, Beta, and Omega. Alphas are the most respectable and most honored secondary genders. Alphas are usually strong and independent with naturally muscular and tall bodies. Male alphas also have above-average penises due to breeding and mating purposes. Alphas usually take what they want since most people are weaker than them. A beta is basically just a regular human; there is nothing special about them specifically. A beta is physically incapable of becoming pregnant as a male and can't sense or smell alpha or omega pheromones. Omegas are by far the most disrespected and ostracized secondary gender there is. Omegas are born naturally weak, both physically and mentally. Omegas aren't the strongest or the most emotionally stable. All Omegas are born with wombs, despite gender. Male Omegas have wombs. Inside a male Omega's anus, there are two separate holes, one for defecating and the other leading to the Omega's womb. Omegas are specifically designed to breed and mate with an alpha. Both Alphas and Omegas can generate pheromones to attract a mate. When an alpha smells or senses an omega's pheromones, they'll become turned on and will feel a need to mate with an omega, preferably the one releasing the pheromones. Sometimes it's torture releasing pheromones since it can cause more discomfort than pleasure. Alpha pheromones are usually tangy and slightly musky, while Omega's pheromones are very sweet and zesty. In the Omegaverse, specifically, the Omegas go through what's called a heat cycle once a month where they are in extreme heat and feel the need to mate. It's pretty close to how a woman ovulates. During this time, an Omega is extremely breedable and is highly susceptible to being impregnated. Lastly, there are pills that help reduce the severity of a heat cycle for an Omega, and there are pheromone cigarettes that can hide one's pheromones.