JoJolion - Chapter 16
As the biker continues his attack, Josuke realizes that with their continued trajectory, the Stand will eventually collide with a metal pole. Seeing no risk in opening the phone, he asks for another route. As soon as he does, the phone calls the taxi driver, allowing Josuke to tell him about the open door of his taxi. With the taxi's door closed, the biker disappears, but Josuke manages to follow the Stand's trail of sounds and fragrance using Soft & Wet to find the user.
The user is none other than Kei Nijimura, who insists on killing him if he persists on visiting her mother, Holy. Josuke chooses to end the fight, reassuring Nijimura that he will not go to the hospital if she truly does not want him to go. At this moment, Nijimura realizes that Josuke has honestly lost his memories and he knows nothing about her or their past. She asks Josuke to let her see his tongue and questions him about his amnesia. Upon future inspection, she informs Josuke that he has seams going down the middle of his eyes and tongue, proving that (similarly to his testicles) he, in fact, has four eyes and two tongues.