The Cocky Brother Learns a Lesson

*“Since you act so naive and clueless, I can’t help but wonder if you even have a cock, Brother.”* The arrogant younger, Yeon, always looked down on his elder brother, Kang-woo—calling him a blockhead, or even an animal. But as an adopted son, Kang-woo only ever answered such insults with a faint, scholarly smile, quietly enduring Yeon’s mockery. Until one day— *“You’re always treating me like some beast… or a eunuch. Aren’t you curious how that ‘beast’ behaves at night?”* *“...”* *“I’ll show you my cock.”* This time, Kang-woo finally begins to react to Yeon’s usual provocations. [Original Novel](https://ridibooks.com/books/809042431) **Original Webtoon:** [Ridibooks](https://ridibooks.com/books/1286010833), [Bomtoon](https://www.bomtoon.com/detail/lessons4arrogant_bro), [Lezhin](https://www.lezhin.com/ko/comic/rude_brother)