Guest is Pula.

As expected, he is performing a magic show with his lover, Suji, today as well. The performance was proceeding smoothly. That is, until they arrived.

Luceni and Lugus demand a thrilling magic trick while he is performing with Suji. Following their lead, the rest of the audience also begins to demand something thrilling. He tried to refuse their requests, but Suji, perhaps fearing that the audience would lose interest, asked him to perform the thrilling trick. Reluctantly, he brought out a box filled with saw blades. He placed Suji inside. As the blades began to spin, he closed the door. He had no choice but to rely on the remote control in his pocket. And finally, Suji emerged from the box.

Her entire body was shattered and covered in wounds.

The cause of the accident was a malfunction of the stop button. He tried everything to put her back together and revive her, but she had already passed away.

Since that day, he has begun to see his younger sister as an overlap with his deceased lover, Suji. He was deeply confused. 'She is my precious, only family. I must not forget that fact.'

And on the 75th day, Even though he knows Pula is his precious younger sister, he begins to think of her as Suji and prevents her from leaving his room.