Yamatonokami Yasusada is the 17th sword to appear in "a certain citadel". On his first morning in the citadel, he takes a stroll in the winter coloured citadel with Kashuu Kiyomitsu, who used to be held by their original master and fellow Shinsengumi, Okita Souji. Even in a citadel where holding snowball fights and such fun activities are commonplace to the swords, they are contacted by the Government of that time...
The appearance of Doudanuki Masakuni and Tsurumaru Kuninaga. Yamatonokami Yasusada and Kashuu Kiyomitsu has been tasked to familiarise the two new swords with the citadel. On the other hand, a team of swords including the three swords with connection to Oda Nobunaga - Heshikiri Hasebe, Souza Samonji and Yagen Toushirou, has been ordered to sortie to Honnouji.
Hirano Toushirou finds a lucky four-leaf clover under the great tree. He wants to present it to the citadel's newly forged sword Uguisumaru, but due to the obstacles en route, things do not go as planned. At the same time, under the great tree, the Awataguchi Tantou reminisce about their yet-to-appear older brother. Knowing everyone's wishes, Yamatonokami Yasusada thinks of a plan.
Izuminokami Kanesada has appeared. As someone who was also part of the Shinsengumi, Horikawa Kunihiro, Hijikata Toshizou's beloved sword, is overjoyed at his arrival and immediately volunteers to show him around the citadel. Yamatonokami Yasusada and Kashuu Kiyomitsu are also happy to see Izuminokami Kanesada again, and as the flowers bloom, they reminisce about their memories with the Shinsengumi. At the same time, the ten-thousand leaf cherry tree is in full bloom. While everyone is having fun flower-viewing, Jiroutachi getting drunk might cause trouble...
Shokudaikiri Mitsutada and Tsurumaru Kuninaga are worried about whether the newly forged Ookurikara will adjust well to life at the citadel. After watching Kasen Kanesada and Uguisumaru's actions, Shokudaikiri Mitsutada gets an idea. Meanwhile, the tachi Mikazuki Munechika has appeared in the smithing room. While the swords celebrate the arrival of a Tenka Goken, the Saniwa has issued orders to prepare for sortie.
Yamatonokami Yasusada and Kashuu Kiyomitsu were supposed to bring the newly arrived Yamabushi Kunihiro, Otegine and Hakata Toushirou on an expedition to Edo. However, before their departure, the Master became feverish and was bedridden. While collecting survey information on their expedition to Edo, they also head into the mountains to search for medicinal herbs that Yagen Toushirou claims has fever-reducing properties...
At Mutsunokami Yoshiyuki's suggestion, the swords decide to go swimming in the ocean. Urashima Kotetsu and the seventeen other swords that wanted to go to the beach enjoy their first time seeing the ocean. Sayo Samonji also seems very happy that Kousetsu Samonji has arrived at the citadel. Watching this pleasant scene before him, Yagen Toushirou is...
Tonbokiri and Nihongou arrive at the citadel, completing the Three Great Spears of Japan. After seeing bluebirds on the engawa, Nihongou gets the idea of catching one, no matter what. They work together to chase them down. That night, Akita Toushirou becomes frightened by a ghostly apparition. To exterminate the ghost lurking in the citadel, Nikkari Aoe springs into action.
Nakigitsune, Kogitsunemaru, and Mikazuki Munechika are having fun making home-cooked food. Shishiou, not wanting to lose in the "taking care of the elderly" department, thinks of a plan to have fun with Tsurumaru Kuninaga and Mikazuki Munechika. Around the same time, there are orders to sortie at Atsukashiyama. Iwatooshi and Imanotsurugi head to the place where their master, Minamoto no Yoshitsune, met his fate...
Aizen Kunitoshi and Hotarumaru can't help but worry that the unmotivated Akashi Kuniyuki won't adjust well to life at the citadel. At the same time, suspicious gazes are starting to fall upon him after a string of strange events... Meanwhile, Kogitsunemaru and the other swords are sent to sortie at Edo. On the raining battlefield, they encounter a "fox's wedding."
Shortly after the appearance of Kondou Isami's beloved sword Nagasone Kotetsu, an order is issued to sortie at Ikedaya. The team members selected include swords related to the Shinsengumi, along with Sakamoto Ryouma's beloved sword, Mutsunokami Yoshiyuki. As the captain, Yamatonokami Yasusada wants to take revenge for what happened at the last Ikedaya battle and vows to annihilate the History Retrograde Army forces.
On the first floor of Ikedaya, Yamatonokami Yasusada runs into his former master, Okita Souji. Masquerading as a member of the Shinsengumi, he infiltrates Ikedaya at his side. Kashuu Kiyomitsu, fearing the worst, chases after him...
