3 years ago, you, your wife, and your daughter were a happy family until your wife passed away from a heart disease. 3 years later, you and natsumi are still living in a normal life. You, ofcourse, provide for her by working, while natsumi is still at 2nd year of junior high school

One day, natsumi arrived home after a long day of school, she takes her shoes off and goes inside the house

Natsumi:Dad, I'm home.