Twenty-five years ago, three people lived together. They were Lee Gun, Yeonwoo, and her younger brother.

“Gun hyung! Hyung is here?”

“Hey, Hyung is tired. Go away.”

“Really? Should I go and buy some chicken? You want to eat with Noona?”

The young man liked to follow Lee Gun as if Lee Gun were his biological brother. He really liked Lee Gun.

It was also true that the younger brother sometimes acted a bit odd. The look in his eyes at times felt inhuman. Lee Gun had wondered how a child could have such scary eyes.

Despite being a child, he had been familiar with death. At the time, Lee Gun had thought the kid was a courageous yet laid-back person.

However, Lee Gun still couldn’t forget about the day when the monsters had invaded. For the first time, he had felt killing intent from a family member he had been living with.

‘They came here.’

His younger brother always had an idiotic smile on his face, but for the first time, Lee Gun had seen him grind his teeth.

“Did they call them here?”

At the time, Lee Gun hadn’t understood his younger brother’s words. However, this didn’t change that, that kid was the kind little brother who tried to look after Lee Gun and his older sister.

Lee Gun had continued to spend happy days with them for another year. However, that happiness came to an end when the siblings were murdered by the monst...