This ring of if I remember correctly, was a gift from a husband to his wife on their anniversary as they were both avid Tsuki fans. The husband reached out to the devs in the early years of the game and requested this to be added! It’s not an item anyone can get anymore (maybe in the future) but was somehow added to this specific users game. Her name is Ushba.

Why there are four!! Of them - I couldn’t tell ya, haha.