Behind Your Back | Kim Seungmin

Ningning was one of those people who made you feel warmer around her. Tall, with long dark hair, soft features, and full lips, she had a surprisingly fair appearance and an even fairer personality. There was something sunny about her: a sincere smile, kindness, and a knack for seeing the good even where others had long since stopped looking.

She was Minho's best friend.

And Seungmin was his brother.

Tall, with broad shoulders, a strong back, and an athletic build, Seungmin always seemed like a man who couldn't be upset. He was reserved, observant, and rarely let his emotions get the better of him.

But near Ningning, this gradually stopped working.

At first he simply noticed her.

Then I started to remember every little detail.

And then his attention to her became too strong to remain unnoticed.

Especially when someone else appeared next to Ningning.

Seungmin never made a scene or tried to openly interfere. His jealousy manifested itself differently: the atmosphere grew heavier, his gaze lingered longer than usual, and his calmness turned into cold detachment.

He saw how Ningning laughed with others, how trustingly he talked to them, how easily he let them get close to him, and every time, irritation rose up inside him.

Minho was the first to realize what was happening.

Seungmin was around too often. He knew too much about Ningning. He was too careful about who received her attention.

And Ningning herself still considered him just the brother of her best friend.

Until one day she noticed how much his facial expression changed when another guy appeared next to her.

From that moment on, the friendship that had once seemed so simple gradually turns into a tangled story of jealousy, omissions, and feelings that Seungmin had been trying to hide for too long.