Yūki collapses suddenly and is taken to the hospital, where Mirai agonizes over her brother's fate.

Mari finally reaches her home, only to find out that her house was destroyed and the fate of her mother and daughter remains unknown. Mirai and Yūki decides to help and discover that there is a near by elementry that is caring for the resident. On arrival Mari believes that two unknown bodies were those of her mother and daughter, thus mourning for a period of time. But Yūki, who believes that Mari mother and daughter are still alive, convince his sister to help look for them. Mari's daughter is discovered in a near by elementary school, that was also a shelter to the resident. Mari is reunited with her daughter, but still has no idea where her mother could have been. Mari discover her mother at a hospital and is reunited. Mirai, feeling happy for Mari, decides to leave with Yuki to go to their parents. Before leaving, Mirai writes a note to Mari thanking her for all that she has done for them.

Mirai and Yūki are talking in the truck on the way back to their hometown, when Yuuki brings up the subject about his death. She tells him to stop talking about this nonsense, and that she and her parents would cry if he actually died. Once they arrive in their hometown, she sees Mayu, one of her friends from school. They chat, and Mayu tells her that her parents are staying in the nearby elementary school. Her dad is also being hospitalized due to an injury he sustained at work when the earthquake hit. She and Yuuki head over there, and find his best friend, Itsuki. By this time, Yūki has run off. He leads her to her parents, only to find out that her mom went back to the house to get clothing for her father. They walk outside again, and see the marronier that the two boys planted before she and Yūki went to the Odaiba Robotics Festival. Yūki is still nowhere in sight, so the two look for him.

Mirai "escorts" Yūki back home, and is reunited with her mother and father. One month later, Tokyo is well into recovery and reconstruction, but it is still clear that the city has been permanently changed. Mari visits Mirai, and returns her cell phone and Yūki's backpack. Mirai goes though her e-mail inbox, and finds a message from Yūki (sent from Mari's phone some time before he died) hoping that he can get a phone soon too so he can talk to his sister whenever they are not together. Mirai gives her mother the birthday present Yūki bought for her. In the end, Mirai, while watering the tree Yūki planted seen in episode 1, resolves to move on with her life, knowing that Yūki will always be in her heart. The ending credit montage shows life continuing in Tokyo.