From Eternal Blue: Koizumi Risa, current height 170 cm. Her surname is translated to "small river". She is the tallest girl in class. Otani Atsushi, current height 156 cm. His surname is translated to "big valley" . A guy way below the average height of a high school boy. They're both known around school as the comedic duo looking funny together. Due to this fact, they've been on each other's bad side ever since they first met. Fate and the whole school have other ideas, and the two find themselves cast as the unwilling stars of a bizarre romantic comedy duo.