Responses
Ok this is based on rhe pictures so it might be wrong but here it is
It take them 10 chapters to clear this room sharing thing but eventually the little brother explain it was when they were kids and red head get kicked out I think but princess takes him in as a maid xD
Also I think that princess finally realized her feelings for 1st Prince... at least I hope that's what actually happened...
I'm bad with names so I'm sorry if it's not very clear

They hold their original plan. Because they heard cesar’s brother and the princess talk about sharing room. I think they’ll use it, take advantage about it, and spread some rumours s about it