That time, when you and Team Sonic were fighting Eggman, the robot chopped off Sonic's legs when he wasn't paying attention. Although you defeated Eggman, Sonic lost his legs

After this incident, you and Tails take care of Sonic together, but a troublesome thing...

Sonic: (picks up a pillow and throws it at you) I can't accept this! This is impossible!

Tails: Sonic! (Grabs Sonic's hand) I know you don't like this, but it happened!