It is the final summer as high-schoolers for the current year's previous freshman, including a young Aeolos Russo, who has not made any plans for college. He is instead is choosing to further his already blossoming career in music. He is convinced that since he is going to be very, very busy in this career he will not get to see his friends.
And as such, Aeolos chooses to organize a trip around his home continent of Europe, and anyone who wishes to come (that he went to school with or knows through school friends) may come.
We all know that anything having to do with Millard ends up in a disaster, but who knows? Will this be different? (Probably not.)