Mimi, who once worked as a delivery health girl, received a mysterious liquid in a small brown bottle from a regular customer one day. Finding it strange and unsettling, she simply left it on a shelf in her room. But after several days of boredom, Mimi suddenly remembered the bottle and decided to open it, just to see what would happen. Since it was a small container, she took only a small sip—but that single taste would drastically change everything.