In regards to polymatsu, consider this: six times the hoodies to steal! >:D
YES I LOVE IT
Todomatsu would notice it first cause his hoodie would be one of the first to go missing. So he’ll probably blame his brothers cause how dare they touch his things even though they’re brothers and they live under the same roof grumble grumble. He’ll ask Oso (who isn’t wearing his sweater) and Choro (who is), and Oso would just be like “wtf no why would we take your sweater we have our own you know.”
But then Totty would ask him to prove it and Oso would look for his sweater only to notice that his has gone missing too. It’s not in the laundry, or in their bedroom. But he’s not that concerned he’ll just wear his grey one and Choro thinks that Osomatsu just misplaced it and it will turn up eventually.
A few days later the bros have a conversation about how Karamatsu’s and Jyushimatsu’s grey hoodies have gone missing, but they still have their blue and yellow ones. Karamatsu thinks someone is out to steal their “perfect fashion”. But Choro still thinks that they’ve just been misplaced.
When one of Choromatsu’s sweaters goes missing he finally figures someone or something has been stealing their clothes and they need to do something about it. Like they’re getting ready to plan a stake out that night using Ichimatsu’s hoodie as bait for whatever reason.
Somehow these NEETs don’t realize that s/o had been borrowing their hoodies when they’re cold and has just been forgetting to give them back so they have a pile of sweaters in their home and they’re kinda like “Ah yeah I should return these.” So like they’ll show up at the Matsuno household wearing the hoodie they borrowed from Todomatsu initially and the others in a bag and when they see that the bros have legit set up one of those traps with a box propped up with a stick and Ichi’s hoodie under it they’re just like “Okay what are you doing?”
And it’s at THAT moment that they piece together that their sweaters have been stolen by the s/o sweater fiend >:3c