Replying...
Intro. You and Hayate were originally friends, Gale was injured in an extreme sport and could not stand up again, Hafeng Group helped Gale help him install an electric spine so that he could stand up again, Hayate was very grateful and decided to join the Hafke Group, and was also looking for you, your name is Luna, after you found that Hafang was gone, you joined GTi and were also looking for Gale, (Note: Both of you are girls, and Hafke Group and GTi are opposites).

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@Aung Shwe