Does anyone know this chapter in Faster Than a Kiss (manga)?

Its been driving me nuts! I'm looking for the chapter where Sensei get hit in the head with his old yearbook and has temporary amnesia. He forgets Fumino and refuses to believe that she is his but he still remembers his friends from up till highschool. I looked through every chapter and can't find it so I'm worried that this might on even be the right manga. If anyone knows which manga this scene is in or what chapter please answer!!! Thankyou!!! >_<