My husband brought my brother-in-law, Yuji, home for the first time in a long time. His wife, Aya, was happy to see him again, but... Aya, who was weak and easily influenced by the opinions of others, was attracted to Yuji, who knew about the troubles of infertility, and fearfully opened her legs. Aya's sexual desire gradually rose from within her body as he skillfully melted her body with his persistent and precise caresses. The still-growing body was unaware of the exciting affair with her brother-in-law.