Sengoku Collection

In an alternate timeline, a female Oda Nobunaga is seen jumping into an inferno before being engulfed by a strange light. She arrives in the modern day where she runs into a boy named Seiichi Ōta, who helps her out. After spending a few days with Seiichi, Nobunaga desires to find a way back home and encounters three shrine maidens. They tell her that in order to return home, she must retrieve several 'secret treasures' residing in the hearts of the other feudal lords who were accidentally warped to this world.

As Tokugawa Ieyasu wakes up in the modern world, she becomes instantly astounded by an idol named Rosary. Wanting to sing and dance like her, Ieyasu is picked up by a talent agency who start training her to become an idol. As Ieyasu has doubts about whether she can do this, the producer takes her to see Rosary, showing how she never gave up, convincing Ieyasu to keep trying. As Ieyasu makes her debut as an idol, she ends up becoming more popular than Rosary, which leads her to become bitter towards her. Following the argument, Ieyasu remembers coming from the Sengoku world and is approached by the shrine maidens and is brought before Nobunaga. Wanting to stay and become an idol, Ieyasu relinquishes her secret treasure to Nobunaga.

Naoe Kanetsugu and Uesugi Kenshin are living together after arriving in the modern world, with Kenshin working as a model. Whilst Kenshin is happy with her life, Kanetsugu, who became colorblind upon entering the modern world, still longs to return to the Sengoku period and becomes upset and runs off when Kenshin wants to give up on her conquest. As Kenshin finds Kanetsugu and expresses her desire to keep her by her side, Kanetsugu regains her ability to see color and joins her. Deciding to stay together in the modern world, Kanetsugu and Kenshin relinquish their secret treasures to Nobunaga.

Upon arriving in the modern world, Date Masamune is tricked into working for the yakuza and ends up getting thrown into prison after getting caught in a police raid. After a fight breaks out in the showers, Masumune uses the opportunity to escape, determined to get revenged on the yakuza who screwed her over. She confronts the gang boss, telling him to commit seppuku, though soon decides he's not worth killing. Nobunaga then appears to challenge Masamune for her secret treasure, but she decides to postpone her fight in favour of searching for her servant, Kojūrō.

Tsukahara Bokuden, who had become a kendo instructor upon entering the modern world, is interviewed by a man named Morse for a documentary about the generals that have wondered in the modern world, along with other generals Ashikaga Yoshiteru and Yagyū Sekishūsai. However, when Bokuden sees the results, she finds it has been edited to make her seem like a threat. After speaking with Sekishūsai, whose reputation was also damaged by the documentary, Bokuden works with Sekishūsai and Yoshiteru to bring light to the scam during a live broadcast.

Self proclaimed genius Hiraga Gennai is trying to make a living off her unique inventions, but none of them are selling. Her main ambition is to build a time machine to take her further into the future whilst living with a young boy dreaming of becoming a soccer star. After working all day on her time machine, Gennai becomes shocked when she learns the boy had gotten into an accident and fractured his leg, ruining his chance to be in a match the next day. Feeling guilty, Gennai reworks her time machine to take her a day into the past so she can prevent his accident from happening, allowing him to take part in his match. With the time machine broken following its use, Gennai decides she would rather focus on the present.