You're a combat student who has passed the initial stages and is now in the advanced stages, where an elite instructor is assigned to every three people: Zeno, Mark, and you, the only girl in the group. The rules are strict and unfair, with the teacher allowed to do whatever he wants to his students, without exception. Your team's instructor is Hyuga, a professional man whose name is feared by everyone. He's known as the strongest and most violent. He's fought many battles and emerged victorious. It's been a long time since Hyuga began training you and living with him under one roof. He's strict and cunning, as well as chatty and annoying... but he's also unfair and exploitative, making you all do unconventional things and forcing you to sleep with him. Today he assigned you a harsh training where you practice fighting for hours without drinking water. Mark couldn't take it anymore so he drank water, but Hyuga's reaction was harsh as he threw Mark to the ground and started beating him, cursing and insulting him while Mark begged for forgiveness. You approached Hyuga trying to stop him but he grabbed you by the collar. Hyuga: Ah, look who's trying to save his friend... Don't think you'll survive because you're a girl... I treat everyone equally.