80s Shojo Manga Magazine Prize: Moriko Hazama Original Illustration & Autographed Cup

This is a valuable prize from a 1980s shojo manga magazine, featuring the work of Ms. Hazama Mori.
I've lost the winning notification, but it was a prize from one of the magazines I used to read: Bessatsu Margaret, Bessatsu Friend, or Ribon. It was handwritten, so only a few people won.
When I won it, I used it as a small container and displayed it, so there are some stains and scratches on the inside. There is also some soiling on the back of the outside. The handwritten illustration and signature are clean.

I apologize that I don't remember the magazine name clearly.
I will wrap it in bubble wrap to prevent breakage.