Kotoko is supposed to spend Christmas eve with Jinko and Satomi, but they cancel on her unexpectedly. Kotoko is now all alone at the Irie family’s house. Meanwhile, on his way to Shigeki’s company’s 20th anniversary party, Naoki sees Jinko and her boyfriend in town. On the other hand, Kinnosuke coincidentally encounters Satomi and her boyfriend at the restaurant Aihara. Kinnosuke decides to surprise Kotoko, since she is spending Christmas eve all alone...
But then again, I'm not Irie-kun's 
girlfriend to begin with.
Pero bueno, tampoco soy la novia
 de Irie-kun para empezar.
Aunque bueno, para empezar, 
tampoco soy la novia de Irie-kun.
Bon, je sais que je ne suis pas
la copine d’Irie.
Mas, eu, para começar, não 
sou nem namorada do Irie.