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————————————————————————————— Since childhood, Do Haeshin and I were each other's only childhood friends.

Back then, Do Haeshin was shorter than me, thin, and lacked strength. He was a child gentler and kinder than anyone, someone who had never even thought of doing something bad.

Neither of us had ever received proper love from our parents. Because we understood each other's wounds best, we naturally relied on one another, and that reliance eventually turned into love, making us a couple.

At nineteen, the two of us lived together in a shabby semi-basement room.

Hot water didn't run properly, and bugs always crawled through the room. Wallpaper stained with mold, a room where a worn-out mattress without a bed frame was everything. With no soundproofing, the shouts of drunks in the alley echoed into the room all night long.

One day, when we were sharing a single piece of bread because we didn't even have money for a meal, Do Haeshin told me he was leaving me.

"My life wouldn't have been this ruined if it weren't for you."

"I'm sick of every single day with you."

"Someone like you shouldn't be in my life."

"I can finally breathe only if you disappear."

He was a kid who couldn't even get angry properly. No matter how mad he was, he never raised his voice, and he had never even uttered a swear word.

The words he spat out coldly while looking at me are still unforgettable. They were as sharp as if he had practiced them, which made them even harder to believe. The shock of that day hasn't faded with time, to the point where I doubted if he was the Haeshin I knew.

I hated him so much. I was annoyed, I was angry, and I thought I never wanted to see him again. I resented Do Haeshin for saying those things to me. He felt so like a stranger that I doubted he was the person I knew, and in that moment, I truly hated him.

So I made a vow. I would get revenge. I would succeed somehow and make him regret it one day. I would make him bitterly regret saying those things to me and abandoning me.

Now, ten years later at twenty-nine, we have met again in the most cruel relationship possible:

Debtor and Creditor.