Harry, who was in seventh grade, traveled through time and defeated the Dark Lord. He went back to first grade, and when he saw Snape, he felt a sad feeling. He (Harry) wanted to save him, but he didn't want to destroy the appearance he (Snape) wanted to maintain - Snape and Harry didn't get along.
Harry maintained their relationship with inner contradictions. It wasn't until one day during labor service that Snape looked back and saw Harry looking at him with pity in his eyes that he realized that he had a problem. He began to think about what went wrong with him. What on earth made the stupid and arrogant golden boy of Gryffindor have feelings for him that he shouldn't have?