Kinjo no hitozuma: Ureta hakuchû furin (2007)

Erotic manga artist Toshikichi is currently in the midst of a creative slump. The deadline is approaching, but he can't make any progress on his writing. His wife, Hisako, tries to be a model and strikes sexy poses, but Toshikichi is aroused by her appearance and ends up getting intimate with her, neglecting his work. The cause of his slump is his beautiful neighbor's wife, Wakako. Toshikichi is captivated by her mysterious aura and discovers that Wakako works at a brothel...