Ep. 17: Tomoya and Ushio embark on an unexpected solo journey after being left behind by Sanae and Akio.
Aired on February 6, 2009

17
Five years after Tomoya left Ushio with Akio and Sanae, he leads a mundane life focused on work, smoking, and drinking. Sanae eventually invites him on a family trip, and despite her persistent requests, he agrees to join them. On the day of the departure, Tomoya realizes that Akio and Sanae have intentionally abandoned him with Ushio. The pair spends the subsequent day and night together. When the others fail to return, Tomoya asks Ushio if she would still want to travel with someone like him. They decide to take the trip alone, walking together while Tomoya wonders about their destination.
Episodes
- Ep. 13 · Tomoya proves his worth to Akio and celebrates Nagisa's graduation before their wedding.
- Ep. 14 · Tomoya and Nagisa navigate married life and the news of an impending pregnancy.
- Ep. 15 · Tomoya and Nagisa decide on the name Ushio for their unborn child.
- Ep. 16 · Nagisa gives birth to Ushio during a snowstorm but dies shortly after delivery.
- Ep. 17 · Tomoya and Ushio embark on an unexpected solo journey after being left behind by Sanae and Akio.
- Ep. 18 · Tomoya buys a robot for Ushio, meets his grandmother, and reconciles with his father.
- Ep. 19 · Tomoya and Ushio settle into their new home after visiting friends and family
- Ep. 20 · Tomoya Reconnects with Kyou and Prepares for the School Sports Day Event
- Ep. 21 · Tomoya cares for ill Ushio, who wishes for a trip before winter claims her life.