Louis feels totally comfortable around and this is the biggest hint. He is just so playful and random, it's nice to see this side of him after everything he faces daily.
I like THIS Louis. This Louis knows exactly what he wants and is super sweet and nice. Holy crap, Daniel deserves this Louis, but is this the Louis that is always going to be here, or the Louis that is only this honest and himself when he's alone and no one is watching. Because the Louis that we knew before was NOTHING like this Louis.
Their growing closeness and testing of boundaries is so lovingly written.