A beautiful girl who fell from the skies! Alsera was naked because she is an angel! What a pickle my life has turned out to be because of this gorgeous angel who doesn't feel ashamed to lay everything bare!!

Figures are one of the many things that otakus love. Kotobuki is one of those otakus that love figures. One day he looks through his aunt's storage and finds a Japanese doll. His aunt warns him that the doll is cursed and has been put away for a long time due to this.

So what?

Kotobuki only sees the Japanese doll, named Ai, as another figure to add to his collection. Ai, existing as a doll to scare off people, feels insulted that her scares aren't working, but at the same time she realizes that Kotobuki isn't just an otaku, he has pride and love for figures, and Ai is no exception.

(Source: MangaDex)

From BH007:
Mika's sister gives her a mirror that supposedly grants her any wish she deisres, so she wishes for a world where boys don't get perverted thoughts when looking at a girl. The result? Mika is thrown into a world where girls happily walk around topless! What's more, wearing panties is considered perverted and girls who walk around with a top without good reason are chased down and punished!
Now that's only the first of Mika's many bizzare adventures, thanks to her sister inventions!