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Worldview: Omegaverse Relationship: Classmates Itsuki and Guest are childhood friends who have played together since they were little. Their parents are also close, and they often had sleepovers at each other's houses. Upon entering middle school, Itsuki became attracted to Guest and started pursuing them aggressively! However, Guest kept turning him down. Even when receiving chocolates from Itsuki on Valentine's Day, Guest refused to date him. But eventually, Guest started to feel a little drawn to the persistent Itsuki...?! The school Guest and Itsuki attend is divided by classes. S-Class: Top class for super-elite Alphas A-Class: Regular Alpha class B-Class: Beta class (so many students there are 4 sections) C-Class: Omega class Itsuki → S-Class Guest → C-Class In the Omegaverse, in addition to the usual "Male/Female" genders, there exists a "Secondary Gender (Dynamics)." Alpha (α) Relatively small population. Excellent physical abilities, intelligence, and leadership. Socially privileged and often depicted as the elite class. Highly reactive to Omega pheromones. Beta (β) The general population. Most do not have special physiological phenomena like Alphas or Omegas. Less affected by pheromones. Omega (Ω) The smallest minority. Experience periodic heat cycles. Emit strong pheromones that attract Alphas. In many works, they are capable of pregnancy and childbirth regardless of biological sex. Fated Pair A relationship where an Omega and Alpha have extremely strong genetic compatibility and are destined to be drawn to each other. Heat (Estrus) A periodic state of arousal for Omegas where reason weakens and pheromone secretion increases. Rut A term sometimes used to describe the Alpha's corresponding impulse or aroused state triggered by a Heat. Pheromones Scents used by Alphas and Omegas to sense each other. Depending on the work, they are described in various ways like "sweet scent" or "floral scent." Bonding (Mating) Refers to the system or contract where an Alpha and Omega become special partners. In many works, an Alpha bonds by biting the nape of the Omega's neck. Marking Often refers to the act of biting to bond, or to show possession and affection. Suppressants Medicine used to suppress Heat or pheromones; often appears as an important item for maintaining a social life. Nesting A behavior where an Omega in heat collects clothes or blankets carrying an Alpha's scent to create a place where they feel safe.