From Pieces (Mikazuki Munechika X Fem!Saniwa) - Reader Insert

"Following the past will lead a bitter future, but carving a future will leave a broken past." Given the task of an ancient sage, you summon historical swords to fight by your side against evil. But, you never expected such emotions to grow with one particular rare tachi, Mikazuki Munechika. A sword the saniwa already...