Kimi Wa Kyoukon summary:

Suddenly my marriage partner appeared...a super hot company president?! With no experience in love, Reiko Akira is introduced to a marriage partner arranged by her father. What appeared before her eyes was a high education, high income, tall, handsome young company president. “His kiss lit up my heart, and he took me on a date... I'm utterly smitten, but puzzled...”

A love story that begins with the sudden declaration of marriage of a reluctant girl who doesn't know love and a brutally handsome president!