涙で虹を作るくらいに。
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泣いたって、タダの涙は流さない。涙を流すなら、虹を作れるくらいの涙にするんだ!!
As my tears can make a rainbow.
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When I am tearing, I wouldn't waste my tears. Even if tearing, let's make a rainbow with that!!
*not sure about my English...