Platonic (2014)

Sara (Miho Nakayama) is a single mother with one daughter. Her daughter suffers from a heart disease and Sara desperately wants her daughter to get better. One day, a mysterious young man (Tsuyoshi Domoto) appears in front of Sara and her daughter. He tells her that he wants to save her daughter's life. Sara comes to love him. Soon, Sarah is shaken between her identity as a mother and a woman.