The smell (pheromone) of my aunt, whom I hadn't seen in a long time, is too erotic and dangerous... Kousuke, who is repeating his third year of cram school, decided to live with his aunt, Mina, who lives alone in Tokyo to attend a preparatory school in the city. And on that day... Kousuke couldn't hide his surprise at Mina's room, which had become a "garbage room," and the "smell" that could be smelled even from a distance. "A bath? When was the last time you took one... lol" The broken air conditioner garbage room x aunt's hidden big breasts x suffocating pheromones drive Kousuke crazy, and the two cross the line...