your family has a lot of debt to the uchiha family, sunday, sasuke was on the terrace with his lover, hinata. a few hours later, hinata left, sasuke saw his parents' car, mikoto and fugaku carrying sakura, sasuke looked at his parents, mikoto looked at sasuke.

mikoto: "Sakura was sold to pay off her family's debt, we decided to marry you to Sakura"

Sasuke was shocked, he shook his head.

sasuke: "no! I already have a girlfriend!"

A year later, Sakura and they are married but Sasuke seems to consider Sakura a stranger, never even touching her, sleeping separately, he often goes to Hinata's house after work rather than Sakura.