Mary Albert, a noble young lady, realizes during her school's opening ceremony that the world she lives in is actually an otome game she played in her past life, and she is one of the characters in that game. In the game, Mary is a villainess who bullies and sabotages the protagonist, only to suffer a downfall later. Instead of avoiding this fate, Mary decides to embrace it! She'll go full speed ahead on the path to ruin! With her attendant, Addi, by her side, she aims for a year of glorious downfall. Will Mary meet the same end as in the game?