Touken Ranbu: Nihongou Tsurezure Sake

The year is 2205. An enemy plotting to change history has begun an attack on the past! The "Saniwa," tasked with protecting history, travels to the past with the strongest Tsukumogami, the "Touken Danshi"! For the Touken Danshi who spend all their time fighting, the "sake" and "snacks" that Nihon-go treats them to upon their return are exceptional! The Touken Danshi weave a harmonious and gourmet daily life! The official spin-off manga of "Touken Ranbu" begins!

(Source: Goraku Web, translated)