In the world of love, you can say anything, but the only thing you don't have to say is "I'm sorry." If you love, there is no need to say sorry, because there is love, so you will forgive no matter what; if you don't love, don't say sorry, because since you no longer love, "I'm sorry" is just a weak and hurtful word.
But in love, what we say the most is often this sentence of sorry.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.