Bikyaku Seido Kaichou Ai

Main character Yoshizawa Atsushi has a strong fetish for pantyhose. He instantly fell in love with student council president Ninomiya Ai's black tights, and joined the council so he could be closer to her. One day, he sneaks into the president's office and successfuly finds her weakness. He blackmails her and starts to train her into his sex slave...