After a getting an engagement annulled our heroine suddenly got the memories from her past life as a uni student in Japan. From a novel she read previously from her past life she realized a destructive end in her life as being a white pig and a follower of one of the main villainess. To avoid this destruction end she aims to loose weight and become independent.
Tensei Saki ga Shoujo no Shiro Buta Reijou datta