Jdrama - woman froze in walk in freezer???

I'm looking for a drama, not sure if it's movie or show. but I know it is about a woman who works at a grocery store and she gets locked in the walk in freezer and when she gets out she feels temperature weird like nothing is warm enough for her she feels frozen all the time. and her husband thinks she's weird and like leaves her. then she saves a kid in a fire and becomes a fire fighter because she isn't super cold when in the fires. then it cuts back and she's in the freezer again. 

Please if you know the title I'm dying to see it again. 

This is the title Yo nimo Kimyou na Monogatari: 2014 Fall Special
 Hieru(冷える )