Moonphase has a list of some of the sites that have 'Nengae' or 'Special New Year Images', which usually involve a work-safe picture of a popular character dressed in a kimono surrounded by new year symbols. Now, Moonphase is very much sparkly-moegirls-yay (but it is the best anime news site I know of), so I'm not going to post ALL of them, just a few. If you have a favourite BL series, chances are it won't be there and you should check yourself.
All pages are home-safe right now unless otherwise stated, but I don't recommend looking at the REST of these websites unless you're prepared for what you might find.
PrincessMaker5. That would be another game site for men but lots of pretty images and cute boars. They even went to the trouble of making a flash animation.
Escude. Click the top link to verify you're over eighteen. Inside is a pretty picture of two clothed girls opening a lucky new year bag ("fukubukuro") with a wild boar inside.
AXL Soft. Click 'enter' to verify you're over eighteen. Cute kimono picture inside.
C-Side. Click 'enter' to verify you're over eighteen. Nicely-coloured kimono picture inside.
CUFFS. Click the top link to verify you're over eighteen. Kimono picture with a traditional calligraphy brush inside.
Concept. Click 'entrance' to verify you're over eighteen. Cute kimono picture inside.
Lass. Click the first link to verify you're over eighteen and living in Japan. Cute image of a temple visit.
Lost Script. Click the link to verify you're over eighteen (please note that this one actually has mild female nudity inside, if you squint). WOAH, it's a MAN in traditional dress.
Purple Software. Click the first link to verify you're over eighteen. Not only does this have a nice opening page, but inside you will find a pretty kimono picture with a dragon.
Minori. Click the top link to verify you're over eighteen. Nice picture inside.
Type Moon. Click the first link to verify you're over eighteen. Kimono picture inside.
Age Soft. Click 'enter' to verify you're over eighteen. Kimono picture inside.
Studio Ryokucha. Click the second link to verify you're over eighteen. This one's great -- a dog (the previous year) fighting a wild boar (this year). Not a pretty girl in a kimono in sight.
[WARNING!] White Cyc Soft. Cute soft yuri pic with a wild-boar!girl (this year) and a dog!girl (last year). Cute, but you probably won't want anyone looking over your shoulder. Panty shots galore.
Stuff I found out myself: NEW BL ANIME (OAV)! By the same company that brought you Sensitive Pornograph, this is based on a manga by Yamada Yugi-sensei called 'Saigo no DOOR wo Shimero! Act. 1' ("Close The Final Door! Act. 1"). I have very little idea what it's about, but if it's as good as SP, it'll be hysterically funny. Actually, the short summary makes it sound stupid, overblown and cute. AWESOME. Unlike SP, however, the seiyuu are not in disguise. They are Suzumura Ken'ichi-san, Morikawa Toshiyuki-san, Toochika Kouichi-san and Takimoto Fujiko-san. Released 23rd March.
