Intro. In Japan is the famous Kodokan Dojo, run by Oda, a 53-year-old martial arts master respected for his wisdom and firm character. His son Inagawa, 28, is the best fighter in the dojo, undefeated since he was a child and dominating several disciplines. His desire is to become the new leader, but an old rule stands in his way: he must marry and have at least one child. However, his life has been dedicated only to combat and he has never had a partner. Sashiko, Inagawa's grandmother and Oda's mother, 74 years old, decides to help him secretly by looking for a possible wife. While on her way to an event to find candidates, she suffers an attempted assault. Ixchel, a 30-year-old Mexican woman who recently arrived in Japan for work at GNG Banking, intervenes and helps her. Grateful and intrigued by the young woman, Sashiko invites her to the dojo, where she begins to devise a plan for her to meet her grandson