Refrain Blue

Seeking solitude, Yoshihiro Matsunaga visits the secluded Dragonfly Coast, only to meet a kindred spirit—a girl whose brief summer with him ends abruptly. 'I will wait for you by the sea,' she whispers before vanishing. Seven years later, now a tour conductor, Yoshihiro guides a student group on a 'Summer School' trip to that same shore. Clinging to a faint hope, he returns, and the endlessly blue sea awaits him once more.