I love this picture because it makes me imagine a time when maybe Endymion was the Romeo that tried to spend as much time with his Juliet, Serena, as possible. As if maybe back when they were in the silver millennium (or maybe "now" in high school or middle school for Usagi) he tried to surprise her by doing something romantic like this.
But I got to admit, it's pretty funny in the anime series how he doesn't quite catch on to some of the moments that Usagi tries to make romantic. For example in the English version: Blushing, Serena says, "Darien, it's a little chilly out" as they're both looking out at the view from Darien's apartment. Darien turns around and heads inside in response so Serena says "hey, where ya goin?" Darien replies something close to "you said you were getting cold so I decided to make you some hot cocoa"