4 years after the winter war most of the captains and lieutenants have a week off so they decide to spend it in the world of the living. They meet up with Ichigo and his younger sister Karin. At the sight of seeing Karin after four years he starts experiencing feelings that he doesn't quite understand both Ukitake and Matsumoto notice how the cold captain fidgets when Karin is around him. They also notice how Karin can't look at Toshiro in the eyes and a small blush appears on her cheeks when she's close to Toshiro.