Hanadera Himawari is a first-year high school student. Both of her parents passed away six years ago, but as the Hanadera family's eldest daughter, she is busy running around every day. She lives together ...

In a future where a pandemic wipes out most of mankind, Raito is tasked to travel back to the past in order for humans to avert that destiny. His mission: to make sure a normal high school freshman Yuu Tanak...