Koyomi Araragi Model Ring Set MONOGATARI Series925 silver has been used to make this Koyomi Araragi inspired ring set. On the black ring is a mathematical formula engraved around a red stone, a color referring to his uniform. The second ring has a simpler design and acts as one half in a set of couples rings: if you join it together with one of the Hitagi Senjyogahara rings, the symbolic Summer Triangle will become visible. Open rings allow for some size adjustment but please be aware that