So im pretty sure evereyone has at least heard of Nana to Karou. A sweet manga (japanese comic for those that dont know) about a boy and a girl and some of there bondage adventures-filled with actual STORY, not just meat-beater scenes. Theres also a spin-off series for those that get hooked on it called "Black Label".....its mostly M/F but there is 1 F/M scene in the middle somewhere.
But the one i REALLY wanted to tell everyone about is one i discovered on accident when i wasnt even looking for anything TUG related (or perverted at that point. I cant say the name so heres the link:
http://mangapark.me/manga/takianna-no-h ... shitte-iru
Story about a boy who has a crush on a girl with a secret BDSM fetish. All i can say is there is ADULT CONTENT. The story has a great concept and has both M/F and F/M scenes. I know most of the guys here on this site or subs, so check it out. Definetly some good stuff/ideas you can pull from this manga.