Yae is radiating happiness after Takumi proposes to her. That's when Ayumu, the eldest Natsume son, comes to visit from NY. Just when they think they're home safe after being at Ayumu's mercy, Takumi's parents come to Tokyo after hearing the news from Ayumu! They hurriedly announce their marriage to them and go to greet them, but then they find out there's a Natsume Family rule that prevents them from having a wedding...?!