Although I hadn't returned to my hometown much since moving to Tokyo, my younger sister Mika suddenly came to visit after a long time. I couldn't even remember how long it had been, but seeing her again after so long made my heart race. She looked mostly the same as before, yet there was something more mature about her. The way she carried herself, her expressions—they all hinted that she had grown from a girl into a woman, and something deep inside me began to stir.