I'm So Sorry Ushio!

This was a Meaningful moment, After the death of Nagisa. Tomoya didn't know how to care for Ushio, So he lets Nagisa's parents raise her, then later they go on a trip together. As Tomoya and Ushio come across a field of flowers. Ushio decides to play in the field as Tomoya watches, but Ushio soon loses the robot, he bought her in the field; they try to look for it, but to no avail. She then gets really sad and starts to cry an he realizes that she's been alone for all this time, and wasnt the only one suffering so He promises he will step up and be there for her no matter what.