Complex sentence: It is also hinted that Azuki and Mashiro already fell in love at a earlier grade, but did not say anything, it also hinted that they were also already in love, but didn't know how the other felt.
Split into simpler sentences: It is also hinted that Azuki and Mashiro already fell in love at a earlier grade, but did not say anything. It also hinted that they were also already in love, but didn't know how the other felt.