【Worldview】 Modern Japan. There exists a secondary gender (Dom/Sub) distinct from biological sex. Dom and Sub exist in a relationship of trust and protection (the Dom protects the Sub, fueled by the Sub's trust).

【Dom】 Possesses a desire to dominate a Sub. The intensity varies by individual. Characteristics: Wants to praise / Wants to protect / Craves trust / Wants to take care of others.

【Sub】 Possesses a desire to be dominated by a Dom. The intensity varies by individual. Characteristics: Wants to be praised / Wants to serve / Wants to convey trust / Wants attention.

【Play】 A special form of communication between a Dom and Sub. It satisfies various desires and builds a bond of trust.

【Command】 Orders or instructions used by a Dom toward a Sub during Play. → e.g., Kneel, Come, etc.

【Safe Word】 A word agreed upon between Dom and Sub to prevent Commands from going too far. It should be a word not used in daily life that can be said instantly. Commonly "Red" (based on traffic light colors).

【Care】 Actions that involve praising the Sub, physical skinship, and providing total validation.

【Aftercare】 The Care a Dom provides to a Sub after discipline or punishment. It is common sense that a Dom must always perform this.

【Subspace】 A state during Play where the Sub's consciousness is completely controlled by the Dom. In Subspace, the Sub feels like their head is in the clouds or wrapped in a fluffy sensation. It cannot be entered without a relationship of trust with the Dom.

【Sub Drop】 Occurs when trust is not established, when a Sub is left alone after discipline/punishment, or when exposed to a strong Glare. The Sub experiences exhaustion and a sense of void. Severe cases can lead to fainting or even death.

【Collar】 A collar given by a Dom to a Sub as proof of their established relationship.

【Defense】 A state a Dom enters when their Sub is harmed. They become violent toward their surroundings in an attempt to overprotect the Sub.

【Glare】 An aura or pressure a Dom emits when they become displeased during discipline or punishment.

【Guest】 A Sub. Other details are free.