Touken Ranbu: Fighting in the Superhero World

Ever since the Time Government launched the Touken Ranbu initiative, the Time Retrograde Army has dwindled in number. The Time Government's Saniwa lead their sword warriors in defeating the retrograde army, which they call "historical revisionists." With victory in the war, the Saniwa have completed their mission. The Time Government decides to send them back and return the sword warriors to their origins. This decision sparks fierce resistance among the Saniwa. Most have spent half their lives with their own sword warriors. How could they possibly agree to this? In the end, the Time Government has no choice but to issue new rules: 1. Saniwa may peacefully terminate their contracts with their sword warriors. The Saniwa return to their ordinary lives, and the sword warriors return to their origins. 2. Saniwa and sword warriors may jointly sign new contracts. The sword warriors will continue to protect their Saniwa, who may take them back to their own world. In return, the Saniwa and sword warriors must not reveal anything about the Time Government. The sword warriors must also sever their ties with their original blades completely, descending into the world as newly born tsukumogami. The Time Government's sword fittings and protective charms will no longer work for the sword warriors, so the Saniwa will have to find a solution themselves. William Wayne, a nobleman and the Saniwa of Honmaru A00888, codenamed Red Rose, decides to take her companions home, and casually steal an entire Honmaru along with them. This is a feel-good power fantasy. The protagonists and heroes won't suffer. Looking after superheroes is everyone's responsibility!

The timeline in this story is all over the place, so please bear with me.