Cute girl with glasses is abducted off the street. Contributed by MoryoX

Ohara Michinori (who is a really cute biology teacher), gets chloroformed by the bad guy. The next time we see her in chapter 4, she is unconscious and bound by some plant vines (looks like a weird science experiment gone wrong). Contributed by MoryoX

A gang approaches a girl who is alone in the woods. They put a "chemical cloth" over her nose and mouth, and throw her into a tree (?). Contributed by MoryoX

Two girls are walking in the forest, when a masked man appears and chloroforms on of them. The unconscious girl is placed inside a row boat. Contributed by MoryoX

A young Japanese girl is kidnapped by some guys, with the goal of employing her at a brothel. Contributed by MoryoX

I am probably getting the order of the scans wrong. It's a chloro scene, but I have no idea what's going on (couldn't even find this manga online). Contributed by MoryoX.

Young blonde girl kidnapped by some unfriendly people. Short scene. Contributed by MoryoX.

A blonde haired woman is kidnapped while walking at night. She wakes up with her hands bound behind her. Contributed by MoryoX.

Small chloro scene. Contributed by MoryoX.

Yumin is the name of the girl. She is the sexy cop of the story; also main love interest of the main character. Yumin is kidnapped by some thugs while on her way to a date. The thugs later discover that she is a Yakuza member, and it FREAKS THEM OUT. Yumin is rescued shortly after. contributor: MoryoX

A school girl is kept hostage by some male students, who use chloroform stolen from the chemistry lab. Contributed by MoryoX.

Kisaragi Hinata gets kidnapped by a guy pretending to be a deliver plant saplings. The manga has a gardening theme. I included lots of setup scenes. There's an unrelated scene later on showing the girl ensnared by some vines. Contributor: MoryoX

Suzuki Hanako-San gets kidnapped, in this romance manga. Contributor: MoryoX.

an Scene of a KOF doujin where Mai Shiranui is kidnapped by other girls from KOF and Fatal Fury Source: g.e-hentai.com

Cute idol singer Chinami-chan is kidnapped by a stalker. There are some panels showing a girl who is bound and tape gagged. Cute scene. Contributor: MoryoX

Minor scene. Contributed by MoryoX.

A girl wakes up in some rich guy's home, and remembers how she was chloroformed. Very minor scene. Contributor: MoryoX

A girl and a boy get chloroformed (don't really know what's going on here). Tags: shoujo magic, naga kura Contributor: MoryoX.

Azuma Kazuma gets kidnapped by a bunch of hooded cultish members. The rest of the good guys get gassed. Contributor: MoryoX

The whole story arc revolves around rescuing Miu, who got kidnapped after losing a fight. She gets captured in chapter 447, and rescued in chapter 466 I think. Lots of shots of Miu unconscious (she wakes up half way through, but faints again).