Contrail: Tsumi to Koi

Aya lost her husband in a random murder case. Since then, she raises her son alone and also runs a curry restaurant. She feels she can't be happy again. At that time, Aya meets Ryoji. Ryoji used to be a promising lawyer, but he got involved in the random murder case. He fought against the murderer and killed Aya's husband by accident. Due to the traumatic incident, Ryoji is unable to speak and now drives a truck for a living. Aya and Roji know they can't be together, but they fall deeply in love.