Ep 9. The Hour of Vengeance

It seems increasingly likely that Natsu had a hand in the fire that took place six months ago. When Mitsuko confronts Natsu about her role in killing her sister, Natsu flexes her position as CEO to essentially tell Mitsuko to leave the premises. Determined to get to the bottom of things, Mitsuko forms an unlikely alliance in her new plan to take Natsu's CEO title away.