My Contract Beasts Are All Yandere Witches

My girlfriend, who was hailed as the strongest combat class and also a rich beauty, kicked me out of our original team and slandered me just to build a perfect team. To stay alive, I had no choice but to return home and continue my trash class. I signed contracts with three adorable pets and trained them into pure yet seductive witches who would only listen to me. To my surprise, I ended up beating my ex-girlfriend into dust during the tournament.