Mitsuba, Okita’s older sister, pays a visit to the Shinsegumi headquarters to announce her marriage. The squad members are shocked to see Okita’s change in attitude when in front of Mitsuba. The two spend some time together for the first time in years. Mitsuba, who has always looked after her younger brother since he was little, is worried if Okita is doing fine in the Shinsengumi. In order to reassure his sister, Okita introduces his “best friend” Gintoki to Mitsuba, but...