Upon discovering their mutual interest in the manga Pink Dark Boy, Hazamada brings Koichi to the home of its artist, Rohan Kishibe, who gives them a tour of his studio. Koichi and Hazamada sneak a peek at Rohan's new manuscript. The moment they do this, they fall under the power of Rohan's Stand, Heaven's Door, which allows him to open their bodies like a book and read all of their secrets. After learning of Koichi's encounters with Stand users, Rohan writes a safety lock in one of Koichi's pages, preventing Koichi from attacking him. He then proceeds to take pages from both Koichi and Hazamada as material for his manga, leaving them with no memory of what just happened. That night, Koichi senses something amiss when he discovers he has lost 20kg, but suddenly forgets about it just as he prepares to inform Josuke. The next day, Koichi finds himself at Rohan's house again, with Josuke and Okuyasu following closely behind.