A sibling king game with only the older sister and two! Apparently, my strict sister, who is living a serious university life, is heading to a group date for the first time. And my sister, who doesn't know what to do, seems to think that if she goes to a group date, she will definitely play King's Game, so suddenly, my younger brother, is involved in a rehearsal practice...

My sister said, "I'll go along with you practicing the King's Game." Apparently he thought he would play King's Game at his first group date next time. As they had no choice but to start dating, they were supposed to practice playing, but the orders were serious, and they escalated into sex! As if torn by this, my sister also develops a sexy atmosphere, and eventually she crosses the final line.