Kinemon OKANO became Otsuya's boyfriend in order to acquire the pictorial map of the Kira Kozuke no Suke residence, since she was a daughter of the head of carpenters who was in charge of construction work at the Kira residence in Honjo.
岡野金右衛門は吉良邸絵図面を手に入れるため、吉良上野介の本所屋敷の普請を請け負っていた大工の棟梁の娘お艶と恋人になる。