My Newlywed Wife and I End Up Sharing a Room with Her Female Boss on a Business Trip: From Morning to Night, I'm Turned into a Sex Slave in a Reverse Cuckold Scenario Maron Natsuki
The protagonist is enjoying his newlywed life, happily married to his wife and coworker. However, one day, he is invited by his female superior, Maron Natsuki, on an overnight business trip. During their trip, unexpected events unfold, forcing them into close contact. Back at a previous company drinking party, the protagonist had defended her from the boss's sexual harassment, and in gratitude, she had drawn close to him physically. Captivated by her charm, he begins to develop new, intense feelings.