Harry's pov
While most children use the train ride home to be with their friends before the summer begins and use magic just a little bit more before having an entire summer without. Well, Harry wasn't like most children. His only two friends in school were in Gryffindor, which meant, as he was in Slytherin, that he was unable to be with them even if they didn't have other friends to be with. As for doing magic... the trace was on wands so as long as there is magic done with them or in a close area to them with no other magical close it would show as if you have done it, which was why Harry left his wand in the mirror of Erised with the sorcerer's stone to make sure no magic would be detected when he does it and transfigured a wood to make it look like his wand. So, no. It won't be a magic-less summer for him. but it also meant he had nothing to do in the train except finishing his summer homework as even to him with perfect memory, advanced theoretical knowledge and the ability to do all of it at the same time would have to work for a few hours to finish it all.
At the same time
In another wagon
Third's pov
As much as they were happy that they managed winning the house cup, all the golden group were disappointed with the result of the end of the school year.
Hermione found out that while she was first place in their year's scores, she wasn't first place in the theoretical test nor was she in the practicals.
The theory first place was her ex-friend Harry Peverell who got perfect scores in everything, while even she had a few mistakes in astronomy, herbology and history.
And in the practical tests in wand subjects students from Slytherin defeat her in different subjects (even Malfoy in DADA) and in subjects without wand her ex-friend once again beat her.
'I might by first place on the overall, but I am more like a third place.' Thinking that, Hermione rose her head with fire in her eyes telling her self that next year would be different.
Marcus's problem was also his grades, as while he didn't fail in any of the subjects, his only O was in flying, he got EE in charms and transfiguration and all his other subjects were A.
'Well, it's not my fault, history and astronomy are useless, herbiology is boring, potions are with Snape and how am I supposed to focus with Voldemort in DADA!' After saying that to him self a few times Marcus started believing it himself and his depression left.
Neville's sadness was related to a different matter all together.
When he first heard about the philosopher's stone he had an idea that it could be used to cure his parents and when they went to save it his idea grew bigger and bigger until it turned into hope that hope blew up in his face when Marcus told him that Dumbledore destroyed the stone.
It would take weeks until he moves past the sadness this false hope caused him.
As for Ron? Ron was hangry and was sad that because he didn't pack his things the day before, he lost the chance to eat more. 'I wonder what mum is cooking' and just like that his happiness returned