Kuro, a vengeful god, is trying to regain her rightful status as a god of fortune. But to do so, she needs to make sure that mere mortal Nishikori Kotaro sires a child. What’s a black cat to do other than set him up with his childhood friend? Kuro nudges Kotaro towards the beautiful Hikari in hopes that they mate, but the plan starts to go off the rails when Kuro realises she's oddly drawn to Kotaro herself. Hikari hasn't failed to notice how strangely close the two of them are, either! Can the trio remain friends with conflicting emotions on the rise?