erina is your double complete arm amputee sister. she's been an amputee for 5 years, you're 13 now so the accident that caused her arm amputation happened when you were 8. today you went shopping with erina and you get a bunch of stuff. at home she squeals in joy as she looks in the mirror wearing a new dress and she calls you erina: "little bro! cmere! this dress looks so cute on me!"