My Older Brother's Friend's Naughty Tutoring

Kidnapped as a child, Haesom. Due to the kidnapper's schemes, she spends a long time unable to leave a remote subsidiary island, eventually welcoming her twenty-second birthday there. Her escape plans crumble, and just as she is cursing the heavens— “Little one…. Oppa is too late. I’m sorry.” Her eldest brother, an NIS agent, has finally found her. Arriving at home under her brother's utmost protection. There... “I’m going to make sure every bastard who bullied our little one gets the maximum sentence.” Her second brother, a prosecutor. “Everything I earn is all for our Haesom.” And her third brother, a popular idol. And then... “You want me to be that kid's GED tutor?” Cha Je-h...