Daifuugou to Utakata no Mitsugetsu - Ai no nai Kekkon nante

After spending a night with playboy billionaire Ramsay against her better judgment, Nola is overwhelmed with regret and runs away from him. Three months later, she finds out she's pregnant and is resolved to raising the child on her own. However, Ramsay finds out and takes Nola to his mansion in a fit of rage. "Marry me," he demands, the proposal coming out like an order. In retaliation against his selfish and arrogant attitude, Nola vehemently refuses. But Ramsay is determined they marry... (Source: Renta!)