Available as both manhwa and novel.
My Sister is a Big Star Mi Hermana es una Superestrella
Also known as: Mi Hermana es una Superestrella · Wo De Jiejie Shi Da Mingxing · 我的姐姐是大明星 · My Elder Sister is a Superstar · My Elder Sister Is A Famous Celebrity · My Sister Is a SuperStar · Chị Gái Tôi Là Đại Minh Tinh · My Elder Sister Is the Great Celebrity · My Elder Sister Is the Superstar · My Sister Is a Big Star · My Sister Is a Superstar · Wǒ De Jiějiě Shì Dà Míngxīng · Mi hermana es una super estrella
What? My older sister, who's pretty but lazy and abused me for fun, was born from different parents than me? What? She wants to become a superstar? Fortunately, I have a System to help cheat her way to stardom. What? My parents asked me to help her find a boyfriend? I’m still single, too, why don’t you guys care about me?! The System suggested that my sister and I are quite compatible, and the System can help pair us up. No way! Being her brother is already bad enough!