Magical DoReMi Episode 6: A Lie Is the Beginning of Friendship
Episode 6 of 51 of Magical DoReMi, aired March 14, 1999, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Nobuko Yokokawa is a liar in the girls' class, but nevertheless amuses everyone with her imaginative stories. When Aiko believes in her and realizes she lied, she becomes very hurt.