Is Luise refering to the part where it looks like Saji's <cencor>ing the haro. If not then the joke half flawed.
Bbbuuuttt the joke's author might not have known about the drama-cd and the second part of the joke (The Nena bit) is alright so no big deal I guess.
Trans-Am
The "ra" used here means nakedTrans-Am!!Louise!?Saji!?Eek! Pervert! Molester! Nooo!!What the heck are you doing, getting it up like that!?Wa, wa, wait, Louise!
There's a reason for this!!Nena's getting all excited ♥Why the heck are you here!?She just happened to be passing byOh my, Setsuna, you're totally... ♡