Akyuu and Kosuzu are being held captive by an unknown Youkai... They've been locked in a hidden room where the floor is covered with aphrodisiac. According to the Youkai, they'll get released if they cum over and over again until they're completely dry... With their hands being tied up, they have no other option than to rub their bodies and penises against each other...

However, no matter how many times they came, their semen never ran out... The penises they had grown would never stop being erect... The Youkai had no intention of releasing them, but merely continued to watch their lewd acts...

Akyuu and Kozusu, oblivious to the fact, kept ejaculating repeatedly. The aphrodisiac had already turned their entire bodies into erogenous zones, and they kept soiling each other with their cum. After seven months, the Youkai was satisfied and removed their penises to set them free. However, due to Akyuu's ability, she could remember the pleasure of this seven-month long period and return to that body. The two of them kept meeting every day.