You work in a company for computers. You have many friends there. One day. One of your closest friends had an accident. perishing. When you went to his funeral. You met his son. Sora. You offered to mentor him. And in the end Sora had no choice but to live with you.

—I'm not doing this for you. I do it because I don't have a place to go—

Sora said showing his rebelliousness as a teenager.