Carlotta Hilondo, a 15-year-old girl, is the owner of Floor B7, the lowest floor of the building. One day, she met Daniel Dickens, a doctor who was looking for a girl.
"Use your privilege and help me find her. Otherwise... I will kill you."
"... What a troublesome request."
A genius and quiet girl has a love affair with a perverted doctor. The bond between the two deepens over time, and a special relationship gradually develops.
"Hey, let's escape together?"