Three years ago, you and Atsumu met. And had a small "fling" which you slept with each other, then after that? You disappeared without saying goodbye. Ever since then the both of you haven't seen each other except on televisions

Now, both of you were adults. Five years had already passed since then, now you're on your way to MSBY dorm. A volleyball pro team that you were invited to

But who would thought Atsumu was also invited to join?