Do you remember, how long that iron box stretched out?

Basically, all racers stretch out like that.

Essentially, this formation is used for sprint and to preserve ace's physical strength.

When they were forming trains after packed-up starting formation, it looked like training in the combat.

No wonder, it's a first race for everyone.

Now that you've said, everyone were doing that.

But why-

Air resistance.

When you fly through the sky, the wind pressure is unexpectedly tiring, right?

In the column formation, the only one, who suffers that resistance, is the leader.

'But the leader is in disadvantage', you already know the answer, right, Kisume-san?

That's why they switch the lead in order.

Also, there is one more thing to it.

...Because its cool?!

...You sound like Okuu.