Soulmates

Soulmate AU- when you turn 16 you have the ability to write on your arm and your soulmate will see it (if they are both 16)
Tsukiyama
They are celebrate each others birthdays together and figure out who their soulmates are along the way. They also have a training camp with Nekoma and something happens. Read to find out.
8,100 words
I do not own Haikyuu or the characters and the art is obviously not mine.