Cross the Line With My Brother's Boss / I Messed with My Brother's Boss / My Brother's Boss Crossed the Line Characters

Lee Ga-Eul
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Lee Ga-Eul

Main character

Nationality:

Birthday: Unknown

A motivated administration student. Lacking relationship experience, she seeks connection through a dating app, only to find her life intertwined with her brother's superior. Her initial curiosity transforms as she develops deep feelings for Do-Hyeon.

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Seo Do-Hyeon
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Seo Do-Hyeon

Main character

Nationality:

Birthday: Unknown

The grandson of a major conglomerate president. Highly successful but uninterested in marriage or typical interpersonal relationships, he finds himself captivated by Ga-Eul after their chance encounter. What starts as a cold, transactional arrangement becomes a catalyst for his own emotional transformation.

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Cross the Line With My Brother's Boss / I Messed with My Bro...

Cross the Line With My Brother's Boss / I Messed with My Brother's Boss / My Brother's Boss Crossed the Line

Lee Ga-Eul, a 23-year-old student aiming to outperform her brother, attempts a one-night stand with a stranger to gain experience. However, she accidentally sleeps with the wrong man: her own brother's boss, Seo Do-Hyeon. Do-Hyeon, a 33-year-old elite businessman pressured to marry for his inheritance, is initially detached from romantic entanglement. After discovering Ga-Eul is his employee's younger sister—and that he took her first time—he proposes a deal: three nights of pleasure, then they go their separate ways. But as the arrangement unfolds, the professional boundary dissolves into genuine, unexpected love.

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