In the adult manga, the Rapeman, the villain often looks like he's chloroforming a victim. However, he is actually applying a tape gag to them. So these are actually gag scenes, but they resemble chloroform scenes.
Keywords: fantasy, Doujinshi, CYCLONE. May have something to do with Magic Knights Rayearth. For a while, I thought this character was Lina Inverse. Not sure who she is though.
Source: exhentai.org
Great scene. The thing she is eating is called "flan".
[Redlight] Tomodachi no Haha wo Okasu ~ Mou Gaman Dekinai
Keywords: pastry,
Alternative title: Doing Your Best Friend's Mother (Doujinshi)
Doujinshi. Lady in Flower Blouse and Pigtails gets chloroformed, but doesn't passout.
Full title: [Ootsuka Kotora] Kanojo no honne. (Her True Colors)
Source exhentai.org
A girl is having fun during a Japanese festival, catching gold fish.
The girl, wearing a kimono, is chloroformed by a creepy older Japanese man. She wakes up bound and gagged. The bondage scene is pretty lightweight for a hentai comic.
A separate chloro scene happens later in the comic, by the same artist. That one is...
From a doujinshi manga that I don't know the name of.
A girl with fishnets and boots is chloroformed in a parking garage. She is blindfolded and tape gagged.