Seeing his aunt's scent (pheromones) after so long was too erotic, too terrifying... Kosuke, repeating his third year of high school, stayed at his aunt Mina's house to go to cram school in Tokyo. Then, on the day of his arrival... Kosuke was shocked by Mina's room, now a "garbage house," and the "stench" that could be smelled even from a distance. "A bath? When was the last time you took a bath...laughs." The broken air conditioning in the garbage house × his aunt's hidden large breasts × the nauseating pheromones drove Kosuke crazy, and the two crossed the line...