sunny boy books

Lincoln bumps into an artificial elf made by a secret organization whose goal is to obtain magic but she breaks out and takes two workers hostage. because she doesn’t know anything about the outside world or her power she does her own test to see what she can truly do and while she is doing so she stumbles across Lincoln training for a fighting tournament. Not really trusting humans because of her and many others being experimented on she tries to kill him but he’s able to evade the secret attack. The elf then starts to like his heart as it beats differently from the other hearts she has collected. So she wants to try and get it but there is a part of her that is telling her to wait as it would be better the longer the Lincoln gets stronger in her eyes so the elf pretty much pretends to be innocent and waits for the most optimal time to kill him and take his heart. But the longer she is with him the longer she wants it and is willing to do anything to get it