Hana finds herself navigating life in the orphanage after a tragic past leaves her alone. With her brother, Hiroto, by her side, she faces the challenges battling her PTSD, and yearning for a normal life.
On her first day of high school, as she stood before her new classmates, heart racing, she introduces herself, "Hello, my name is Sano Hana; I am 15 years old and... I live in an orphanage. I hope we can all be good classmates."