User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-25395791-20150831151104

Regarding the kiss, I don't think it was silhouetted, but rather that the scene was trying to depict inverted colors like when Zeref stared at Zancrow moments before killing him. But then again, it's just my opinion regarding it.