Our crybaby protagonist Hirahara Tsukasa hasn't always been a crybaby. Due to the death of her older sister Chihiro, Tsukasa hasn't been able to stop the dam of tears ever since-even at the little things. She is disheartened after moving to Tokyo from Hiroshima, especially after a series of incidents cause her and her four classmates to miss the bus and be late for the entrance ceremony on the very first day of the school term. However, it is precisely this event that draws her closer to maturity and fuels her determination to stop her crybaby tendencies. And perhaps, she may even find an unexpected love on the way...