From Stiletto Heels: Douzono Tsugumi, a major electrical company employee, spends her vacation at her grandmother's country home. Her grandmother sadly passes away during hospitalization, and Tsugumi decides to continue living in that house. However, a mysterious man shows up holding the key to the rear house, and despite not fully comprehending the relationship he had with her grandmother, they begin living together. The manga was nominated for the 3rd Manga Taisho Award (2010).

English translation was completed at Volume 2. FYI: https://bato.to/title/20129-otoko-no-isshou