Read I Thought I Was The Main Character on the website Bladetoon.com with Alternative Name: 내가 주인공인 줄 알았다
Description: Transmigrated into a romance-fantasy novel, the narrator wakes up as a nameless extra and convinces herself she must be the heroine. Enjoying the “main-character route,” she grows close to the supposed male lead, the second lead, and even the hidden villain…
Until blunt questions get blunt answers: none of them actually likes her. Facing reality at last, she drops her beliefs, decides to find a husband who suits her status, and walks away before she’s deluded again.