Yuuri-chan no Chuuken-kun

On the morning of his high school entrance ceremony, Masato Kisaragi is finally reunited with his childhood friend and crush, Yuuri Asakura, who has just returned from living abroad. Although Masato finds himself completely at the mercy of the spirited Yuuri, his feelings for her only grow stronger. However, there is one major complication: Yuuri has an arranged fiancé, and it happens to be Masato's own older brother.