Nasa's knowledge is a big help to the people around him, but even he's not sure about the list Kaname finds on the internet that describes the symbolism behind different kisses.
However, as you have guessed, 
I haven't studied at all!
!لكن ظنكم في محله، لم أدرس على الإطلاق
Aber wie du schon vermutet hast,
habe ich überhaupt nicht gelernt!
Comunque, come potete ben immaginare,
 non ho studiato un tubo!
No entanto, como você deve ter
adivinhado, eu não estudei nada!
Тем не менее вы правы:
я совершенно не готовилась.