>>100970551The Japanese word that refers to eternity 永遠 has two common pronunciations, eien and towa (!?). And unlike in English where you can figure out how to pronounce a word based on its context clues, e.g. the very topical word read is used as a verb with two pronunciations but can be determined using tense, there is no way to determine whether 永遠 should be pronounced eien or towa if you see it written
That is why lyrics almost always use furigana to indicate it should be sung as towa because otherwise most singers would likely default to eien
Even in picrel, you could infer that it should be towa as an obvious name drop because Palette is Towa's original song, but that won't work in most cases