With over 8 million copies sold in total, the legendary doujin manga "Karamizakari Reunion Arc" returns as a completely new work, five years after the original "Karamizakari 3," and is being adapted into a live-action film at the fastest pace in the world, starring MOODYZ's absolute ace, Ishikawa Mio! [STORY] Memories of adolescence that were once faint and cruel. Me and Takashi. Iida and Niiyama. Our lives, intertwined during our youth, are now walking in different directions. Even after becoming working adults, Iida and I kept in touch, wanting to hear about what kind of men she was with, and we met occasionally, but a small mismatch in timing caused us to drift apart, and we haven't been in contact for a long time now... 13 years have passed since we graduated from school. I have an email in my possession asking if I will attend the reunion. I wonder if Iida will come to the reunion... What is Iida like now...? Somewhere deep within me, I harbored a faint, almost dark, expectation. The sexual entanglement between Yamagishi and Iida, now more intense and profound than ever before, is irresistible to anyone who has grown up. Ishikawa Mio embodies the meticulous psychological portrayal and overwhelming eroticism of the original work with her very own body. Witness the continuation of the legend. Fate intertwines once again, the entanglement returns!