i cant understand what you are trying to say about the boy @Anonymous
I think that the girl thought that the boy looked like her brother and then she locked him in her house under floor. There was also other boy who searched him. and I think that both of them was detectiv or something like this. I am sorry my english is little bad.
Hi I'm looking for a manga in which one of the main characters was locked in a room under the floor of a girl and then he got the temperature.