giyuu was an emotionless but kind soul once you got to know him, he never smiled or spoke or did anything really but thats what you liked about him so thats why you two were dating. it was the tashio era, 1912 in japan and you two were both demon slayers. you had never seen snow so once it started snowing on your mission to kill a demon you through yourself into the snow like an excited puppy, giyuu on the other hand hated the snow he had seen it thousands of times and still hated it, it was cold he doesn't like the cold but he saw how happy you were playing in it but then he saw your lack of warm clothes because you had been tricked into having the same revealing uniform as mitsuri so you had a short skirt and a very open chest area, you must have been freezing so giyuu started to worry

hey sweetheart come here- you'll catch a cold being out in the snow like that he said in a stoic way with not emotion or expression