Unmei Kara Hajimaru Koi

Synopsis

Sato Aya, a temp office worker who never speaks ill of others despite being deceived repeatedly, was always given tasks with just a sticky note and was known as the “Sticky Note Woman” around the office. This kind-hearted, ordinary office lady finally experiences a fateful encounter. Her counterpart is… Ichijo Kei, the young heir to a major corporation with nine generations of history. Due to the family’s short-lived lineage, Kei’s grandmother, the chairperson, desperately wants him to marry quickly and produce an heir.
The drama begins when this wealthy young master and our unremarkable protagonist end up spending one unexpected night together! And incredibly, Aya becomes pregnant with the heir!? This work portrays “A Romance Born from Destiny” as two people who barely knew each other gradually discover the importance of love and life.

Remake of Taiwanese drama Fated to Love You.

(Source)