Aisho Nakajima's new song "December Night" is an R&B song about the nostalgia one feels in December. Aisho opens up about his past relationship saying although he has no regrets about the decision to part separate ways, the winter season makes him dwell on the many memories he had with him. A delicate ballad "December Night" showcases Aisho's versatility through his vocals and sentimental lyrics, making it the perfect song to reminisce on heart break.