You're welcome. https://forum.novelupdates.com/threads/seduce-the-villains-father.102309/page-25 you can scroll down to the comment section. There is a tutorial on how to set up an accnt and payment for kakao here. Though I havent set up for the payment yet cos Im too lazy
Hi! You can buy it here https://page.kakao.com/home/폭군의-누나로-산다는-것은%5B완결%5D/51268677. But for you see the whole novel, you need to download the app. You can download it using a VPN and set the location to South Korea and DL it in the Appstore/ Google Play.