Naoto Takahashi, of "Ikkyuu Nyuukon" fame, is the assistant coach for the all-female lacrosse team (of "Joshi Luck" fame). And so, he makes the effort to train said team to win. And win they did.
Now comes the hard part. You know these popular H-stories about how a cheerleader or female manager ends up becoming a sex toy for the male players of a sport. Now flip all the genders on a coin. Let's see how long poor Naoto can survive as a breeding stud before he breaks.