動物学者ピエールと、彼の友人の恋人優子が、言葉と国境の壁を乗り越えて愛を成就する。

Yuuichi Tanuma, our young hero, is a senior at Kyonan University and captain of the marathon team. His parents run a sukiyaki restaurant back in his hometown. When his allowance stops coming in, Yuuichi moves back in with his folks to work part-time. He has his eyes set on nationals in the fall, until one day he runs into a young woman who's fallen into trouble with the Lightning Gang...