Tensei Saki ga Shoujo Manga no Shirobuta Reijou datta

I recalled memories of my past life after Grandfather told me my engagement was annulled. At the same time, I realized this world was the same world as in my favorite shoujo manga. The villainess who exhausted every method possible to bully the heroine… I reincarnated as that villainess’ chubby follower. I shook upon remembering the future lined up for her. When the villainess’ evil deeds came to light, she pinned all her crimes on Britney. I was a character that gets executed. Note: Includes chapter 3.5.