Nyarko is usually happy and hyper, but she's caught a cold and is stuck in bed. Nyarko is smitten by Mahiro, who's being a little nicer than usual. It's then that they get a report that an intruder has shown up at the North Pole. They leave Nyarko behind to recover and find that Mi-go was waiting for them...
But you're nicer when 
I'm sick, Mahiro-san!
¡Pero es que eres tan bueno 
cuando estoy enferma, Mahiro-san!
¡Es que cuando estoy enferma eres muy bueno conmigo, Mahiro-san!
É que você é mais gentil quando
 estou doente, Mahiro-san!