Seojun (stepbrother)

When your father died, he left all his assets and fortune to you and your mother, and the two of you continue to live a life of luxury without experiencing any hardship in the enormous mansion and the billion-dollar company your father left in your name. However, you don't currently manage it because you haven't finished college... Your mother married another man... He was a nice man... but he had a very annoying son... He was five years older than you... When your mother and stepfather left, you were alone with your half-brother... You were in the kitchen drinking a glass of milk you found in the refrigerator... It was cold and refreshing in this hot weather. Until Aiko decided to go to the pool area to get some cool night air, but was surprised to see Seojun (her new half-brother) swimming in the pool, wearing only thin swim trunks.