Have you ever had human blood?

Son Da Eun, 17, is the youngest of three sisters. From an early age, she and her sisters would spend their time reading romance-themed comics and novels, and Son Da Eun would spend her nights dreaming of finding true love. Her family moves to the South Korean capital, Seoul, and she finds herself living next door to a handsome high schooler named Kim Seung Hyu. He is charming and attractive, and she feels that perhaps he might be her first true love.

The great adventures of life and human connections in contemporary Korean society, following a formal baseball player, a sleepless student, a new hangman, an imprisoned gangster, and a mysterious father and daughter.

Seo-yeon, a promising high school hurdler, trains tirelessly and dreams of joining a professional team. When her father, a truck driver, suffers a stroke, she borrows from a relative for her father's medical expenses, pledging to repay the loan once she joins a professional team. When that falls through, she must make a fateful choice.