Sengoku Collection - Season 1 Episode 20 Vengeful Fang-OS

As Mitsuhide becomes overwhelmed with guilt and flees, her assistant Mori Ranmaru runs into Nobunaga and explains how Mitsuhide had been in a coma following a fire. Prior to entering the modern world, it is revealed Nobunaga and Mitsuhide got in an argument where Nobunaga insulted Mitsuhide's lack of a secret treasure. As Mitsuhide grew jealous after Hideyoshi got her own secret treasure, a secret treasure of her own began to grow inside her, filled with negative emotions. Then one day, when Nobunaga put Hideyoshi in charge of a command unit instead of Mitsuhide, secretly because Nobunaga wanted to keep her close, Mitsuhide's secret treasure takes control of her, driving her to set fire to Nobunaga's temple, which caused the phenomenom that sent them to the modern world. Back in the present, Mitsuhide is found by the tea master Sen no Rikyū, who tells her Nobunaga is still alive. Nobunaga soon appears to claim Mitsuhide's secret treasure, but Mitsuhide manages to drive her off and escape, saying she can't relinquish it to her just yet.