Strawberry Slightly Sour

High school - slightly sour, because of you, but fortunately because of you... Learning - like the last 3/4 of a periodic sine function, 1 to -1, you wait at 2π and I return to 0, everything starts from zero... Secret love - like sine and cosine in the same rectangular coordinate system, you rise and fall, and when I fluctuate again, you do not obey the rules but take a step back, which is the beginning of another story... Strawberry is like you, chocolate is like me. The first bite tastes completely different, but the aftertaste is slightly sweet... Intention: complementary attraction, mutual achievement