Based on

Movies like Yôrô hômu no seitai: Nikuyoku herupâ (2008)

Chiharu and Taichi begin living in the home of Soichiro, an elderly man, to provide care. Although Soichiro is heterosexual, he finds himself inexplicably drawn to Taichi. One day, while out for a walk, the two witness a man and a woman having sex...