Hiiro no Kakera

Hiiro no Kakera is a series of video games from Idea Factory. They are similar to games like La Corda d'Oro in that it features a female main character surrounded by a large group of male characters (these kinds of games are called "otome games").

I like the darker style of artwork for these games.  I think most of the pics come from the first game, but I'm not entirely sure.