Oshi no Shuuchakushin wo Namete ItaNew推しの執着心を舐めていた; I Underestimated My Oshi's Attachment

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.