Danna-sama wa Subete wo Ataeru

"Shuri Kujo is the only woman for me." I will definitely take Shuri back from that man...! 18-year old Shuri is going out with Takeru, her childhood friend who is two years younger. But their love is over... On the condition that he help repay her father's debts, Shuri marries Kyosuke Okochi, the president of a big company. However, Kyosuke appears before the heartbroken Takeru and makes him an unexpected proposal!

(Source: Shogakukan, translated)