http://fncent.com/jyh/collabo/index.html?url=/jungyonghwa/b/introduce/7670

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"추억은 잔인하게.."라. 궁금 폭발입니다 ㅋㅋ

Title: "Cruel are the memories.."

*In Korean, the "cruel" part is adverbial and not an adjective. We'll have to see the entire lyrics to be certain that this is a good trans^^;