I Underestimated My Oshi’s AttachmentOshi no Shuuchakushin o Namete Ita; 推しの執着心を舐めていた; Oshi no Shuuchakushin wo Namete Ita; I Underestimated My Oshi's Attachment; Одержимый тобой; 최애의 집착을 우습게봤다

Estefania worked herself to the bone for her familys sake, while they took her for granted. One day, Estefania realized that, reincarnated in the world of her favorite novel, she was a supporting character who didnt have much time left to live. She closed the book on her days of living in her familys shadow, and set out to meet her oshi, the Grand Mage Synil Crown. However, as Synil is cold-hearted and ruthless, she had thought to be satisfied with just seeing him once, but before she knew it, she became the target of his attachment!? S- Synil-sama, isnt this a bit too close? In what way? Note: An oshi is a favorite member in an idol group or a favorite character from a story, movie, game, etc.