On Ryuji's first day of school he meets Taiga, who puts a love letter meant for his friend in his bag by mistake; they reveal that they love each other's friend, so they make a pact to help each other out.

As Ryuji spends more time with Taiga, he finds both kindness and weakness in her. He promises to be the dragon to help the tiger capture the heart of her love.

Kitamura tells Ryuji he first me Taiga when he tried to ask her out. Taiga also shows a different side when she tries to find a picture of Kitamura, but can't decide on one she likes.

The final main character, Ami Kawashima, appears. Ryuji was caught off-guard by her true nature. She acts like an innocent angel, but she is, in fact, a selfish little demon. She could be a new source of problems as she doesn't get along with Taiga at all.