Yamatonokami no Yasusada has manifested as the 17th member of the Sword Warriors in a "certain citadel". On his first morning since coming to the citadel he goes on a walk around the compound with Kashuu Kiyomitsu who shared the same former master, Okita Souji of the Shinsengumi. The Sword Warriors, who enjoy daily life at the citadel with snowball fights and the like, have received word from the history government...

Hirano Toushirou has found a four-leaf clover of good luck underneath the big tree. He intends to give it to Uguisumaru, who has just arrived at the citadel, but while he is on his way he encounters a number of obstacles making his task not so easy. Meanwhile, the Awataguchi tantou's are underneath the big tree thinking about the older brother who has not yet manifested. Knowing their wishes, Yamatonokami Yasusada is thinking of a plan.