Who would have thought that such a stimulating smell would come from that lazy aunt... Three years have passed since Kosuke took the entrance exam for a prestigious school due to his mother's ego. Kosuke has decided to live with his aunt, who is a landlord, for a week to attend summer classes at a prep school in the city. However, the aunt he finds there is a lazy aunt who lives in a messy room that has turned into a trash room and hasn't taken a shower for two days because it's too much trouble. Kosuke is turned on by the suffocating pheromone scent that wafts from his aunt...