Mimi Yoshioka (吉岡 美々, Yoshioka Mimi) is a middle school model who has a long-standing crush on Atsushi Ōtani and is a love rival of Risa Koizumi's. She is a support character in the original manga and anime, and a protagonist in Act.2 of the sequel manga.
Atsushi Otani are next door neighbors. Mimi goes to his house everyday to give him milk, so that he'll grow taller. She wants Otani to become taller because he said that he'd only date girls that was shorter then him. She's concerned about this because she fell in love with him. But then he started dating a girl named Risa Koizumi. So when she found out she was furious. And since she found out about Otani and Risa, she tries and tries to break them apart.