Ever since Hihi, the youkai, learned tennis from a human, he`s been enraptured. An athlete he trained even reached fourth in the world. Bored with training monkeys to play, Hihi decides to train an athlete to win the gold medal at the next Olympic games. Excited, he heads into town and runs across Mana`s friend Yuumi. The two hit it off, and right away start intense daily training, but soon crack begin to appear in their relationship.