At the end of episode 11, Goriki asks Odokawa's old doctor for his diary from his hospitalization after the accident that killed his parents. When declined, Goriki insists to give it to him not because he's Odokawa's doctor, but because he is his friend. That was thoughtful of him.
The movie, Odd Taxi: In the Woods, adds scenes which show what happened after the end of the original series. This includes:
Odokawa drawing everyone's "animal forms" from memory, with a shot of Odokawa's friends displaying their animal portraits. It is very adorable.
Everyone participating in a picnic and having fun together — including Shiho, whose most notable interaction with the cast was luring Kakihana into a yakuza trap. Apparently she's on fairly good terms with Kakihana now, at least enough to participate in a picnic with him.
The very last shot shows the black cat peacefully sleeping in Odokawa's appartment, indicating that he still has it.
