There's a lot of body positivity in the Marauders fandom, so a lot of fics and fanarts depict plus size characters, Lily, Mary, etc... It's so good to show wonderful character, not in the standards of classic beauty.
But among the boys, the only plus sized representation is Peter, the traitor. so I thought I would show "Effortlessly handsome" Sirius as a charming, cute and sexy chubby boy.
It was Harry who decided that Tom looked comfy enough to sleep on and obviously Tom wasn't going to say no to that. He's the kind of obsessive bastard who can't function without constantly touching Harry in some way or another, so acting as Harry's makeshift bed during his naps is a dream come true.
Harry thinks that the horcrux inside him might have addictive, maybe even healing?, properties to the main body, or something along those lines, because why else would Tom be all clingy with him considering their less than stellar beginning? but being touch starved himself, he welcomes it and tries not to think too hard about how nice it feels holding hands with his supposed nemesis whenever they walk down the halls together in school. He also keeps the image of Ron and Hermione giving him the side eye locked very tightly in a box, shoved firmly in the darkest corner of his mind, whenever situations - like him deciding to visit Tom in the Slytherin common room and proceeding to glomp on him while they're in the middle of a Knights meeting - happen.
(Cue Knights going bug eyed as Tom, unphased, readjusts Harry in his lap and continues on with the meeting. It will happen often enough that the members don't bat an eyelash to such occurrences anymore and decide not to question the ambiguous nature of their relationship either bc a content Tom is a less crucio happy Tom.)
Bottom line: Harry's perfectly fine with living in denial, thank you very much, because as far as he is concerned, he's not the savior of anything anymore in this reality. A sane and very handsome*cough* Tom Riddle who somehow sees him and his opinions in high regard, is willing to take a less radical route regarding his still world dominating plans (Harry will take what he can get bc he knows a lost cause when he sees one), has no qualms giving him affection and promises to spoil him rotten as long he stays by his side? Yeah, even Merlin won't be able to convince him to go back to his old timeline. He's fine with seeing his old friends again in a different, hopefully better, future.