本当よ響ちゃん。私たちは帰らなかったんじゃなくて帰れなかったの
響 - Hibiki (name of a character)
So the storie goes like Hibiki goes in search of her friends who haven't come back in 2 weeks. When she founds them she asks them "why havent you come back" And they respond with the above asked
So how do they differ ?