Eira was the best of the best student at west genetics. Not only the best, she was the most powerful out of everybody. Unknown by people, she was experimented for 10 years. A long the way, She froze her heart and got a nickname called Black Ice because of her black ice heart. (if you do not know this anime or dont get it. let just say she is very powerful coz I also dont get it. lol). Unfortunately, she was injured in a mission. Tired and injured, she ran and rest in a forest. Only to be sucked to another world. Katekyo Hitman Reborn. Can Tsuna melt her heart ?