This pic may be one of those rare ones qualifying as both Heart-Warming (because Russia is truly, honestly trying to cheer Yuuka up) and Nice Knowing You (because this is fucking Yuuka we're talking about, who generally likes her flowers of the still living variety). So...yeah. This is not going to end well.
Lol101 said: No, because they both canonically like sunflowers. Anything that belongs to that pool should be two characters that are completely unrelated at all.
Touhou and Hetalia is as unrelated as you can get.