Disclaimer: I don't own Harry Potter.
Harry raced all the way back to the Gryffindor common room from the Potions classroom, his thoughts all in a giant mess. He had always idealised his dad as this brave and heroic man. Instead, he discovered in the Pensieve that his dad was, for lack of a better word, a douche bag. The next thought that entered his mind that Snape was right all along. That was the worst thing, Harry thought. Snape didn't say it just to anger him, he said it because it was the truth. After seeing his face after he was out of the Pensieve, Harry at least owed it to Snape to admit that he was right.
A few days later, Harry made his way down to Snape's office during his free time. Heart pounding, he hesitated before knocking on the slightly decrepit door.
"Enter."
He slowly opened the door and poked his head in. The sight shouldn't have been surprising to him, but it was anyway. Snape was reading the Daily Prophet behind his desk, with a cup of what Harry assumed to be tea next to him. The paper folded down in half, with his eyes peering up to meet Harry's. Immediately, they narrowed.
"What do you want, Potter? Come to intrude more of my thoughts and see the arrogant man that was your father?" he sneered.
On reflex, he would've have snapped back that his father was a great man, but he knew better. "Actually, that was what I came here to talk to you about." He entered the room fully and leaned against the door.
Snape uncharacteristically tilted his head and sipped his tea, as if challenging him to speak further.
Harry sighed. "You were right about my father."
He spit out his tea and stared at him as if he sprouted two more heads. He sputtered, "...What did you say Potter?"
He ran his hands through his hair, not that it made his hair any tidier. "Well, I never knew my dad, obviously. I thought that he was this great man who could do no wrong. I always defended him whenever you insulted him because that was all that I knew, or thought to, know of him. But...seeing your memories," Snape winced, "I realized you were right. Shocked is only putting it mildly. He was definitely arrogant and somehow, I can't believe I'm related to him." Harry forced a laugh. "But I just wanted to tell you that you were right because I feel terrible for invading your memories. So, I'm really sorry about that, sir."
Snape leaned back in his chair with his fingers interlaced, obviously contemplating what to say next, but never letting his eyes leave Harry. He shifted uneasily under his intense gaze.
"Potter, you are just like your father. A rule breaker, Mr. Popular," Harry bit his tongue, "but I will admit this: you are slightly more honorable. At least you can admit your stupid mistakes." He nodded.
Snape sighed. "...there is so much you don't know Potter, about your family. But...seeing as you have made a small step towards becoming a more responsible person, I think it's time you learned." He smirked.
"Sir?"
"Sit down, Potter."
So there Harry sat, way past dinner time. During that time, his view of Snape had turned 360 degrees. Quite frankly, his life had been turned upside down. Not that it put him and Snape on more drastically amicable terms on the outside. But at least he wasn't insulting him as much, nor taking away House points on a whim.