After her husband dies, Chitose, the second wife, finds out that he has a huge debt. She sells the house and moves into a one-room apartment with her stepson, Yuuma, where they can live a basic life. However, their new home is so small that their bodies are pressed against each other! What's more, the sweet smell of Chitose's body and the feel of her oversized breasts and ass... Yuuma's sexual urges are stirred up and he finally goes into heat! Yuuma can't help but rub his erect penis against Chitose's body...