During jujutsu practice, Luke no longer treated her as a woman, and he was frequently subdued by her during sparring.
Of course, with each practice session, each fall, Luke made progress.
After meeting Natasha, Luke used his third jujutsu card, which was also his last one.
But the problem wasn't serious, as the Detective System upgraded to an Exchange System, allowing him to redeem points for the cards he needed, meaning he could continue exchanging points for jujutsu practice.
With the boost from the jujutsu cards, Luke learned quickly. He had already grasped the theory and basic moves yesterday, and today was mainly about sparring and learning techniques like grapples, chokeholds, and strikes.
The sparring sessions lasted about twenty minutes each, and after the twenty-minute sparring session, Natasha would spend five to ten minutes explaining the key points of the movements and where Luke had made mistakes, followed by a ten-minute break before continuing training.