My husband brought my brother-in-law, Yuji, home for the first time in a while. Her wife, Aya, welcomes her reunion with pleasure, but... Aya, who is vulnerable to push and is easily influenced by people's opinions, is swept away by Yuji, who knows about her infertility troubles, and she fearfully opens her crotch. His relentless and precise caress, which deftly melts her body with her words, makes Aya's sexual desire gradually well up from within her body. Her body, which continues to be developed, finds herself in an exciting infidelity with her brother-in-law.