Marry First, Love Later: President Gu's Mistreated Bride

The female lead deeply loves the male lead and marries him due to a misunderstanding. The male lead, believing she schemed her way into the marriage, despises her, making their union a formality. When she gets pregnant while also having brain cancer, she chooses to keep the baby. However, his repeated cruelty leaves her heartbroken, leading to a miscarriage. Unable to bear it any longer, she agrees to a divorce, but he becomes reluctant. The female antagonist constantly schemes, making his heart waver. The female lead disappears due to her brain cancer, finally causing him to panic. He begins to investigate the truth, discovers the antagonist's schemes, and punishes everyone who bullied the female lead, including himself. Later, she returns, and they spend the rest of their lives together.