You are Tsukishima and Yamaguchi's childhood bestfriend but the three of you lost contact when you had to move to Australia.
You're life is a mess due to your sister's hate to you that you don't even know where it came from.
Finally coming back to Japan even though you doesn't like the idea of coming back, at least you reunited with your bestfriends and met new friends. Coming back to Japan also lead you to meet someone that you wouldn't expect to be the source of your happiness.
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I do not own any of the Haikyuu characters. I just own the book and plot.