Light my Dark Heart (Korekiyo Shinguji x Small! Reader)

The Yin-Yang. Yin: Death, Stillness, Female, Moon, Cold, Soft, Dark, Passive, Submission, Weak, Small, Hate, Negative, Severity. Yang: Life, Movement, Male, Sun, Hot, Hard, Light, Aggressive, Dominance, Strong, Big, Love, Affirmative, Mercy. The twins of life. I'm Yin, the other, my twin, is the Yang. I'm, what others...