The story goes that this little girl(I think was an angel) is being tortured by the devil (like I think was having sex with her), and she run away. While running from him, she somehow gets to a place where a gangleader was trying to recruit people(I could be wrong but I know he aws holding a contest) and the little girl hears this and kidnaps a girl so that she could be in the competition. She wore this red dress and later beated all the men she was fighing in the competition. She is then taken to the gangleader, ahd she embarrasses him. I think she called him a virgin, or that he was her dad. The gangleader asked an underling to kill her. The underling was bald and so the girl offered a piece of her hair.
1- This one is a yaoi where a kid was disowned or something like that, and the demon king takes him as a slave(something like that) and the king later falls in love with the boy(he looks quite young like a kid)
2- This one is a story where a little girl is tortured by the devil. The girl is an angel, and she runs away from him. Running away from him, she goes to a place where a gang leader is trying to find a strong person, and she enters and beats a bunch of people. Another fun part was when she offered A piece to her hair to a gang member because he was bald.
Just for the fist manga... could it be this one ?
http://www.mangago.me/read-manga/vartrag_tale/
This story has 2 boys and one girl. One of the boy is the female lead brother and he is becoming famous. Their school that the female lead and the brother go to have two parts. One for the normal and the other for the popular. The females brother friends falls in love with the main girl.
Maybe?
http://www.mangago.me/read-manga/anitomo_my_brothers_friend/