Hikiroku and Kamezasa ordered Gakuzo (Sosuke INUKAWA), a houseboy working for the Otsuka family, to watch Shino, but by mere accident Shino and Gakuzo discovered that they had the same beads and bruise, and secretly decided to associate with each other as brothers (Gikyodai).
蟇六夫婦は大塚家の下男・額蔵（犬川荘助）を信乃の監視にあてるが、ふとしたきっかけから信乃と額蔵は互いが同じ玉と痣を持っている事を知り、二人は密かに義兄弟の契りを結ぶ。