This is probably a story full of infatuation and unrepentance, well... No one is truly heartless. People who are usually cold-hearted can also give everything to others, so there is nothing left when facing others. I love you, does it really have nothing to do with you? No one is a saint. He is willing to give without asking for anything in return. He just sees through and recognizes it and cannot bear to embarrass you. So even if he is unwilling, even if he is sour, even if there are tears, he will not let you see it, so he turns around and leaves your back.
Conception: