Jamais vu

It's hard to come to terms with the fact that your best friend, with whom you have been close for almost 15 years, suddenly disappears. And it wouldn't hurt so much if she got hurt somehow, no matter how cruel it may sound. The most painful thing is that she simply went to another country, found new friends and her life, in general, is wonderful. But a few years later she returns back to Korea. She ends up in the same school and class as before. But Yunjin couldn't even imagine how Kazuha, whom she abandoned, had changed.