Well, at first Haru isn't letting him move very much, but when Lucien chills out enough he will fling his own shirt aside because there's no good way to "put it back on" after having spent any amount of time selectively intangible to it, and if Lucien wants to take off his shirt in this interval he can.

Lucien tries! But he is having difficulty operating it apparently. 

"You want your shirt off?"

There's the impression of a nod through the tangled shirt.

Haru gets it off of him and flops back down into a less restraining hug.

Does it do anything more if Lucien hugs even tigher.

A bit, yes, but mostly coverage and not pressure is doing the work here.

"The guest bed is actually bigger than my bed so I propose that I just stay here overnight, okay?"

"Sure - 

Could there be a worse time to be suddenly turned on. 

"-uh."

Probably not.

what if we just resolutely ignore that.

Yes, that would be great, unfortunately it's definitely impossible Haru hasn't noticed. 

Yes, for once Lucien is completely right that it is impossible for someone to not notice something about him. However. What if we resolutely ignore that anyway.

Is there a way for Lucien to move his hips while making this completely normal expression so that it is at least less salient maybe.

Yeah, they can pretend his leg is falling asleep and reposition with Lucien as a little spoon, how about that.

An extremely unconvincing excuse and Lucien is suspicious that somehow this still leaves Haru able to feel him somehow but Lucien will just not say anything about this and think about something distracting and not sexy like the production process of newspaper ink.

Any chance he would tell Haru about the production of newspaper ink till they fall asleep?

Yeah he can do that! It turns out Lucien was involved via his role in the newspaper industry though it's not clear how.

How mysterious.

Zzzzzzzzz "patisserie."

"Hmm?"

"Sonder."

"I'm not sure what you're referring to there."

"Voyage. Harpsichord."

"I've definitely ended up far away from my home but I'm sure what harpsichords have to do with it?"

"Sonnet. Pound. Halibut."

"I haven't heard the sonnet you're referring to, I think."

The words don't get any clearer in their relationship to each other or Lucien over time.