Himitsu no Yūgi

When Ayaka was little, she loved to be around her neighbor Ryo, but the two grew apart. That is, until by chance an adult Ayaka finds herself assigned by a temp agency to work in the same office as him! Ryo has become a dashing young professional. Not only does he remember Ayaka, he's also quick to invite her out for lunch. Ayaka is ecstatic, but later that evening, when she's scrambling to finish a mountain of work, she trips over. When Ryo reaches out to catch her, their lips happen to brush..!