France x UK GinHiji crossover

Handcuff series IV
FrancexUK cos GinHiji, FrancexUK version
So these two have to pee sooner or later, too...Really, it's not difficult, but it's awfully embarrassing, don't you think? So here is France smiling evilly at UK's discomfort!
This isn't my day for drawing I guess, so it's a bit crude...or maybe it's not so obvious after all?
The GinHiji version: [link]

op: Rochu GinHiji Crossover: [link]
II: PrussiaxAustria. aph version:[link] ; Gintama version: [link]
III: USxUK. aph version: [link] ; Gintama version: [link]
V: GermanyxPrussia. aph version: [link] ; Gintama version: [link]
VI: SwedenxFinland (Plan A). aph version: [link] ; Gintama version: [link]
VII: SpainxRomano (Plan B). aph version: [link] ; Gintama version: [link]
VIII: JapanxChina (Plan C). aph version: [link] ; Gintama version: [link]
IX: GermanyxItaly (Plan D). aph version: [link] ; Gintama version: [link]
ed: RussiaxUS. aph version: [link] ; Gintama version: [link]