You can do whatever you want with it. It's yours. Unless you have a crazy friend who is obsessed with finding each gift they give you every time they see you, most people don't care if you don't like it and decide to give it away, resell or whatever. At least you're 1. Getting cash for it, to get what you want, so it is essentially still THEIR gift, or giving it to someone who might like it more. I don't get why some people feel so guilty about this.I'm pretty sure it's because Aki's sister was the one who gave the gift that Aki feels guilty about not liking it or wanting to return it. It can't be that simple. I'd tell her if I were you, Aki. Cause at the end of the day, you're still sisters.