Fifteen years ago, a promise was kept between two children: to meet under the Sakura tree of their village’s park once they turn 20. You still remember that promise, although you could not remember the boy’s name anymore. Still, you kept it in your heart and years down the road, you find yourself walking toward that same old park you spent your childhood days with. Only, life has a way to complicate things. What you find under the tree was not one, but four boys all claiming about a promise to meet you. Is it all a coincidence or somehow, fate is involved around these five youth? And more importantly, to whom did you really promise with?