EVE chip

Named so because of the "Adam and Eve" story, Eve giving the apple of knowledge but also bringing sin with it.

Is a computer chip, placed into the brain of a person, it will use subliminal brainwashing, pushing a person to make lewd choices without ever noticing hard mind control. Overtime it rewrites how a person thinks, making suggestions seem reasonable and make them seem like once own idea.

People with strong will experience headaches but will always find excuse for actions they take as "necessary". Unlike other brainwashing technology, it keeps the overall personality intact. Which in the case of Taimanin can be useful in the later use of spies or soldiers.

Affected, might become sex slaves by their "own will" and do not suffer typical regrets over it.

History
The chip was made in secret by the Washizu Group under orders of the Incubus King. Distributed to places like Under Eden and Seishu Academy, to create sex slaves and soldiers in a short time.

In Taimanin Yukikaze, Mizuki Yukikaze and Akiyama Rinko were implanted by such a chip. After the true ending it was discovered by Kiryu Sabato, and removed. Finding information about the Washizu Group, lead to the later investigation of Seishu Academy which had Washizu Shigeru as its headmaster.

Kousaka Shizuru was infected by a cloaked Mizuki Shiranui, which used a new version of the chip that could invade the body over a cut wound with poison as a cover.

In the true ending the chip is removed once by a mini clone version of Kiryu Sabato, left with Akiyama Tatsurou. In the bad ending, either Yukikaze and Rinko that show up as reinforcement, get reinfected after a fight by the chip and turned into servants of the Incubus King.

Media

 * Taimanin Yukikaze 2
 * Taimanin Yukikaze (retroactively)
 * Taimanin Asagi Battle Arena