Daevil

I am looking for a shojo manga, it starts by somehow having a girl (high school age I think) somehow get into a strange new world where she ends up saving this super powerful demon from the "good" guys. Throughout the story they fall in love and take down a corrupted orginization (can't remember if it is a church or the government) The girl may or may not have powers, can't remember. The demon is tall, black hair... The first time they meet is in a large forest... If anyone can help, please let me know. Thank you!

I am looking for a Shojo manga that is about 2 high school students who are groupies for a band, one boy and one girl. One day they see the band members having sex and copy them and end up getting pregnant and both the guy and girl are very naive. If anyone can help, Thank you!