Toumei Otoko to Ningen Onna: Sonouchi Fuufu ni Naru Futari

Akira Tounome is an invisible gentleman who runs a detective agency, and Shizuka Yakou is a mild-mannered blind woman who works there. Shizuka can always find Akira, even when he turns completely invisible. Love begins to blossom between them as they grow closer to each other day by day. A touching and adorably frustrating romantic comedy is about to begin! (Source: Crunchyroll)