Soichiro Yabe is the editor for erotic novelist Hanasaki Horie, father of the series' protagonist. His work involves direct collaboration with Hanasaki on literary projects like *Promiscuous Lament* and *100 Words of Significance in Bed*. This professional connection necessitates Yabe's frequent presence within the protagonist's household and occasionally draws him into Hanasaki's personal matters.

Physically, Yabe is an adult male with black hair, grey eyes, and is notable for his glasses. His age is unspecified.

Within the narrative, Yabe serves as a secondary character. His appearances consistently relate to his editorial duties and professional association with Hanasaki Horie. He does not drive major plotlines but functions as part of the supporting cast around the Horie family. His personal history and character development remain unexplored across all confirmed media, including the sequel manga *Ao-chan Can't Study: Otona-hen*, spin-offs, movies, or OVAs. His role remains strictly defined by his working relationship with Hanasaki.