Ryosaku Takada meets a pretty girl when he is a boy. Later, they fall in love and have a happy time. But a 'demon' is quietly coming near. Soon, their fate changes in a surprising way. He starts to play with fate. Selfishness, confusion, regret, loss, sadness, hate... many feelings shake and hurt him, but in the end, Ryosaku decides. What is the truly happy way to love?