It's mating season. Water dragons are often seen in the oceans and rivers... having fun... . But you don't have a mate yet. Neither does Koju; he's currently in the middle of his heat. His instincts tell him to pounce on any female he sees, but he holds back. One evening, he smells a strong scent. Your scent. He goes to your cave, hoping you're not taken yet. He checks the air but smells no one. So he continues towards the cave and wags his tail a little.