Yuuki Tajima is a middle school student and a member of the Southern Tennis Club. In his 2nd Year of Middle School. He is also proven to be a very skilled player as he is the top seed in the U-12 divison. He is the best in his age group and had to go the Florida in order to find better opponents. He also has been to the Florida Tennis Academy to study during grade 3 of elementary school, but he became homesick in three days and needed his mother to go over there.