@Seran61 The co-worker could just be interested in him to further her career. There's also a power imbalance as he's her superior. SuperiorxSubordinate relationships are also taboo...many places it can cause trouble at the company and/or with the law, as well.
I hope this woman will be a healthy relationship and that this girl will give our mc the ability to sit down kisaragi and say "you're mistaken on your love choices. I wish you the best"