Ok, these come from the page of 真城 悠 (Mashiro Yuu, http://white.ap.teacup.com/mashiroyuh) but the blog entries they're posted under mention: イラスト:ヤソシゲルさん, so they should be under the artist Yaso Shigeru (who we already have here). I guess I'll just tag it as yaso_shigeru then.
Haruhi: Since Yesterday Mikuru and I did the bunnygirl advertising, today it's Kyon's turn. Kyon: Wha? Haruhi: Weren't you listening? Today you'll be advertising the club dressed as a bunnygirl. Kyon: Are you stupid? I'm a guy! Who would want to see something like that? Haruhi: Oh, I see. So it's fine if you're a girl? There we go! Kyon: Gyah! W-What's going on? I've been turned into a.. g-girl!? Haruhi: Now it's ok, right? Come on! Just suck it up and strip! Kyon: Gah! ..Wait, even my voice is girly? Hey, stop it! Watch the hands! Ah... Aaahhh! Mikuru: Kyaa~ Haruhi: Don't just stand there Mikuru, give me a hand! Mikuru: Kyo, Kyon-san... Haruhu: Alright! We're done. The costume looks good on you. Not quite as good as on Mikuru though. Kyon: Oh my god... I-I don't belive it.. I'm... A bunnygirl... Haruhi: All good! Let's go! Follow me, Kyon! Kyon: L-Lemme go~