I Became the Dying Female Lead's Sister

시한부 여주의 동생이 되었다, Sihanbu Yeojuui Dongsaengi Doeeotda, I Became the Sister of the Time-Limited Heroine, I Became the Younger Sister of a Dying Woman, 余命わずかなヒロインの妹になりました, Я стала младшей сестрой неизлечимо больной главной героини, Sihanbu yeojuui dongsaengi doeeossda 시한부 여주의 동생이 되었다, I Became the Dying Female Lead's Sister