Clannad

Theory of Everything (1x14)

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Kotomi finally leaves the house to find that Tomoya worked in the garden all night long and had fallen asleep. When she returns to school, Tomoya, Kyou, Ryou and Nagisa are all waiting for her. The mysterious stranger whom she was so frightened of, believing he wanted to steal her parents' thesis, is there as well. Kotomi and her friends find out that he is her legal guardian, and that there never were any written notes for the thesis after all. The envelope Kotomi set fire to, and felt so guilty about, was nothing important. The stranger also has a birthday gift for her: her parents' suitcase, which survived the plane crash and was passed from hand to hand for years until he found it. Inside is a teddy bear, Kotomi's gift request to them before they left, and an affectionate letter. Kotomi, holding the bear, is so happy that sparkles literally fill the room, and makes peace with her parents' deaths at last.