Hatsukoi wa Marude Yaiba no You ni(2012)

Hatsukoi wa Marude Yaiba no You ni

Satomi was told to marry her brother in law, Hongdae. Even since the passing of her Sister, Kyoko, Satomi's dad is worrying for not able to find a successor to Asahina Private hospital. In the eye's of Satomi's dad, Hongdae is his best candidate to take over his leadership. In order to prevent protest from the board, he wanted Satomi to take Sister's place - to become his wife so that he could once again be related by marriage to Satomi family. Satomi is just an ordinary gal who is studying at nursing school and wanted her first love that she would embrace forever. She was shocked when her dad informed her about marrying Hongdae and in dilemma about it....until one day, she found something shocking about Hongdae....

(Source: TCmanga)