I Will Create a Good Ending for the Yandere Villainess Novel

Melissa, a common salary woman, now Lillian Ker Arius, an extra she had never heard of, has to survive in a world based on a Otome RPG game she played before meeting her untimely end.Finally, being able to meet a character she admired for so long due to their uptight, strict, but gentle personality, how will she fair when she finds out that this character she admires so much is secretly a yandere underneath all her coldness?