A Teary Diet Diary is the 7th episode of Pastel Yumi, the Magic Idol. It first aired on April 18th, 1986.
After her dad makes a thoughtless comment, Yumi takes a bath and is shocked to find she's gained three kilograms when she weighs herself after getting out and decides to go on a diet. But then everyone keeps giving her more and more tasty food! How will she ever lose weight?