Irozuku Monochrome

There is a reason why she must strip. Class council president Youku has the ability to control wind!? However, to use that ability she must remove her panties.

**From AngryFox:** Yuusuke is a guy who loves flat-chested girls. On his first day in high school, he meets the girl of his dreams who is also his sempai, named Momoka. She asks him to join her club, which is in trouble due to the lack of members. Despite his childhood friend's warning, he decides to join the notorious and mysterious club...

A new program has been set in place for a certain area, where children are separated by gender into eastern and western territories. They're raised with no contact with the opposite sex, and made to only focus on their studies. Of course, there are a few bad apples, and the worst of these are sent to a co-ed school with the troublemakers from both sides. Unfortunately, this school soon became known as a place where the teenagers would battle to determine who was the strongest, and many boys and girls tried to be sent there. At this school, the girls have an advantage, since the boys mysteriously get nosebleeds whenever they look at them. However, the strongest girl, Jun, is shocked to find that the strongest boy, Kyo, doesn't get a nosebleed when he looks at her! It turns out that both of them have had some experience with the opposite sex in the past, and they both have embarrassing secrets in the present...

Isshiki falls in love with a maiden who is pure and innocent, but he has been possessed by Asmodeus, the demon of lust. The demon tries to arouse Isshiki by stimulating the sexual desires of the girls around him in every possible way. However, in order to exorcise the demon and avoid the girls' suspicions, Isshiki must never get excited, no matter how lewd they may act! "How can I stand this...!"