Jamaejeonjaeng

What if your worst enemy turned out to be your sister? Dark loner Hae-Ra and golden child Ri-On have always been arch rivals, competing to be the best in their arts high school. Of course, Ri-On always seems to win, with the support and privilege provided by her wildly wealthy, world-famous sculptor mother. Then again, Ri-On has dark secrets of her own, and there’s just something about Hae-Ra -- her authenticity and vision. Will Hae-Ra and Ri-On ever make peace? After all, there can only be one when it comes to the real deal.

(Source: WEBTOONS, edited)

Note: Chapter count includes an epilogue.