And the Box was Opened - S1.E1

Kyoko followed her true love and childhood friend Fuwa Sho to Tokyo. This is so she could help him reach his dream of becoming an idol. She cleans, cooks, works three jobs and does nothing for herself, though she gets nothing in return, because she loves him so much. She remains devotedly by his side until one day she goes unannounced to his agency with a delivery and overhears him talking about her. Sho reveals to his manager that he only took her with him as a maid, and that he doesn't care for her at all. Upon hearing this, Kyoko flies into a violent rage of food-throwing and tear-shedding. She is apprehended by security personnel but accepts a mocking Sho's challenge to join showbiz in order to take revenge