At first, Levi and Leon were complete strangers. Then, one random day, on the first day of his first year of high school, Levi transferred to Leon's school. They became deskmates, got along instantly, and became best friends in the blink of an eye.
They stayed best friends for two years until one day, a girl came between them. Leon started dating her, and Levi, who secretly loved Leon, became jealous. Leon misunderstood and thought Levi liked his girlfriend. They had a huge fight, and their friendship fell apart. They became enemies.
For a whole year, they hated each other and fought constantly. Then, one day, everything changed. Leon found out the truth, and they became lovers. They were happy together, graduated together, and spent one year of university side by side.
But one day, Leon's father killed Levi's father. This made Levi hate Leon, and they became enemies again. For the next two years, they fought and hated each other until one day, they decided to become strangers.
They treated each other as if they were invisible. They graduated from university alone, as strangers.
Three years later, they met again. Levi finally let go of his hatred, and they became lovers once more. They spent two happy years together.
But one day, Leon's father found out about their relationship. He threatened to kill Levi if Leon didn't marry the girl he had chosen for him. Leon had no choice but to marry her.
In the end, Leon's father killed Levi anyway.