Yurume is determined to not get out from under the Kotatsu, but after getting it stuck in the hallway her friends try to help remove it. 
You're having fun behind my back again.
De nuevo divirtiéndose a escondidas de mí...
¿Otra vez os estáis divirtiendo 
sin haberme avisado?
Estão se divertindo
 sem me chamar.