Some of my favourite aspects of the show:
The pajama party that the central characters (who live on the same floor of an apartment) have almost every night in the common area outside their units.
The indoor swimming pool. With its modern fittings and panoramic night view, it's simply SURREAL.
Yukichi + Usami. Yukichi's surveillance habits and Usami's facial expressions are hilarious. They are even funnier as a duo and their friendship is really sweet.
Usami + Airu. What can I say, they're really cute together.
Yukichi's dress sense! The combination of his geek glasses with velvet jackets, funky-coloured pocket hankies, striped bow ties etc. is deliciously wacky.