The rooftop seems suffocating because all the windows have been blocked by other buildings. 

Every night women from next door can be seen through the windows?! Jae-min moves into the rooftop across from school but is disappoointed that all the windows have been blocked by other buildings. However, he learns that every night he can see the neighboring women from the other building! Something exciting goes on one night in that rooftop which has the greatest "view" ever!