Touken Ranbu: Hanamaru EP6 - June - This citadel is joyous, isn't it?

Yamatonokami Yasusada and Kashuu Kiyomitsu are preparing to go on expedition in Edo with Yamabushi Kunihiro, Otegine, and Hakata Toushirou, who recently arrived at the citadel. However, just before they go off on their expedition their master has been laid low with a fever. On the advice of Yagen Toushirou, the group adds one more mission to their Edo expedition and heads into the mountains to collect medicinal herbs that can relieve a fever.