4-banme no Kyokon Kouho

Manami comes from a family with many affluent connections but is otherwise unremarkable. A longstanding family arrangement requires one of its members to wed the son of a successful business owner. Initially, she feels secure since she is last on the list of possible candidates. However, she discovers that her potential husband works at the same company where she has recently begun employment. To her surprise, she becomes his direct subordinate. Additionally, he seems to take a particular interest in her, frequently drawing their paths together and gradually bringing them closer.