When Harry found his footing again, he realized he was on a moving train.

The train was full of children, seemingly new students of some school, wearing the iconic wizard robes, some holding wands in their hands.

"This is from the beginning of our first year."

Lupin's voice came from Harry's right, tinged with clear nostalgia.

"To be precise, it's on the train to Hogwarts at the start of term. My memory."

Sirius's voice, of course, came from below Harry. He was still in his black dog form, his voice emanating from the No. 3 radio's male broadcaster.

"Look! Harry, that's your father!"

Just as Harry was curiously looking around, Sirius's words made him instinctively turn his head in that direction.

A pair of boys who seemed to get along well were walking towards them, chatting and laughing.

"I heard the Sorting Ceremony might involve fighting a dragon!"

"That must be a lie. Adults wouldn't make eleven-year-olds who don't even know magic fight a dragon. I bet they'll have us do some low-intensity tests."

Harry's eyes immediately landed on the bespectacled boy who, aside from the eye color, looked almost exactly like the older version of himself!

Put Harry and him together, and almost no one would doubt their father-son relationship.

For a moment, Harry's breathing grew heavier as he stared at his father's youthful appearance, until the two figures passed straight through his own spectral form.

Sirius, of course, noticed the change in Harry's expression. This was exactly what he wanted.

From Lupin, Sirius knew Harry had grown up at his aunt's house, living a difficult life until Severus took him away.

He also knew that Harry missed his parents deeply, often asking Lupin about what kind of people they were.

Now, here in the memory, letting Harry see his father's relationship with him would surely improve Harry's impression of him.

In the memory, James and Sirius were clearly looking for an empty compartment to sit in.

They opened several compartment doors, but all were full.

Finally, when they opened another compartment door, they found an empty one.

They sat down together and began chatting. They had only just met but clearly shared many common interests.

Not long after, a knock sounded outside the compartment, and a girl with deep red hair and emerald green eyes just like Harry's peeked in.

"There are seats here, Severus!"

At the girl's call, another boy with black hair entered the compartment. Harry recognized him instantly, it was his Professor!

Confirming it was his Professor with the girl, Harry turned back to look at the girl and froze for a second. Then, Lupin's words confirmed his guess.

"That's your mother, Lily Evans, Harry."

At that moment, Harry realized this train compartment had gathered his parents, his Professor, and his godfather… all the people closest to him!

"You knew each other before entering Hogwarts? Shouldn't you have become friends?" Harry asked, puzzled.

Lupin just motioned for him to watch patiently.

After Lily and Snape entered the compartment, James and Sirius didn't pay much attention to the newcomers.

Until they overheard a conversation between the two.

Lily seemed immersed in some sadness, and Snape clearly wanted to distract her and cheer her up.

"You'd do well in Slytherin," Snape said.

Harry knew Slytherin was one of the Hogwarts Houses, and his Professor had been the Head of Slytherin before he left Hogwarts.

"Slytherin?"

However, this remark caught the attention of James, who had previously been ignoring Snape and Lily.

Compared to them, James, though also slender, gave the impression of a child who had been dearly loved by his family from a young age.

"Who wants to be in Slytherin? If I entered there, I think I'd leave. What about you?" James asked the relaxed-looking Sirius sitting opposite him.

"My whole family have been in Slytherin," Sirius said, not smiling.

"Blimey," James said, sounding very surprised, "And I thought you seemed all right!"

Sirius grinned.

"Maybe I'll break the tradition. Where are you going, if you've got the choice?"

"Gryffindor, where dwell the brave at heart! Like my dad."

Snape made a small, disparaging noise. James turned on him.

"Got a problem with that?"

"No," Snape said, but his slight sneer said otherwise, "If you'd rather be brawny than brainy-"

"Where're you hoping to go, seeing as you're neither?" Sirius interjected suddenly.

James roared with laughter.

Their actions made Lily sit up, her face flushed. She looked at James and then at Sirius with dislike.

"Come on, Severus, let's find another compartment."

"Oooooo..."

James and Sirius imitated Lily's lofty tone. As Snape passed, James stuck out his leg, trying to trip him.

"See ya, Snivellus!" A voice shouted, and the compartment door slammed shut...

Sirius stared intently at Harry.

"See? What kind of person your Professor used to be! He actually said Gryffindors were brainless idiots, and he wanted to go to Slytherin! You have to know, Slytherin is-"

Just as he was about to launch into a tirade, Lupin kicked him. Sirius then noticed Harry's face was tense, his brow deeply furrowed.

Sirius instinctively thought this was because Harry had seen his Professor's dark side and was reacting this way.

However, before Sirius could change his tone to comfort Harry, Harry spoke first, his tone unfriendly.

"Was this my Professor's fault? It was my dad who started it by mocking him first!"

Sirius was clearly taken aback by Harry's reaction.

"That can't be called mocking... He said he wanted to go to Slytherin, Harry, do you know what the Slytherin House-"

"No matter which house someone wants to go to, it's their own choice, right?" Harry retorted, "If Hogwarts has four houses, it means each one has its purpose, regardless of being 'good' or 'bad'."

"While that's true..." Sirius tried to argue further.

"Even if both sides had issues regarding the houses, what about afterwards? You mocked my mom, then directly started the physical part, trying to trip Professor, and gave him an insulting nickname right then and there!"

Harry said loudly.

"In this first meeting, I can't see any point of righteousness on you or my dad's side, nor can I see what Professor did wrong!"