[It's not creepy it's Japanese!! You see the true reason Japan has no pupils is... okay no. But anyway, at that tone, Japan's hands instinctively rise to try and wave away the warning. He stares at Seifer with determination.]

Please do not take such a tone with me, Seifer-san. Ah.. perhaps I can put it in your terms. [BRACE FOR HIS BEST SEIFER IMITATION spoilers it's not the best he expects to be laughed at or maybe hit again]

If you want me to stay out of it then you gotta prove that you can handle it. You're posse, remember? Did you really think I wouldn't notice?

[and then stopping that horrible casual speech and hurhur he said posse]

... Ah, I believe something like that would be said if the situation were reversed.