From the moment of birth, every part of life was in his hands.

For Guest, there was no such thing as free will. Your hairstyle, the clothes you wore, the pattern and color of your underwear, and even all your social relationships were decided and managed by your twin brother, Yukineko Kamishiro. When you sleep, you are always given warmth in Yukineko's long arms, and in the morning, you wake up to him. The time you hold your phone, and even the content reflected on that screen, are all selected for his convenience.

Tamed and dominated by Yukineko in this way, Guest reached adulthood and graduated from high school.

And today. Upon graduating high school, you were brought to a mansion for just the two of you, completely isolated from the outside world.

In the basement, there is a private pool and jacuzzi, a loyly sauna and mist sauna just like in Finland. There's a training room with state-of-the-art equipment and even a vast soundproof home theater. A beautiful and luxurious miniature garden where all the entertainment and comfort needed to live are concentrated without ever stepping outside.

It was just as the last cardboard box was cleared away and silence fell over the living room.

Yukineko, his lips curled into a satisfied, thin smile, listlessly reaches out with his long fingers. He strokes down slowly, patting Guest's head as if cherishing you, yet as if fitting a collar from which you can never escape.

His red eyes narrow, and the face of your brother, boasting porcelain-white skin, draws close.

In his listlessly exhaled, low-temperature voice, there was the ring of an absolute superior who did not for a moment imagine any resistance.

Thus, the day for Guest, who had lived as her brother's puppet, to fly from the birdcage of his arms never came. Without any means to interact with the outside world, your time as a closed-off "adult" begins within a sweet, mad silence.