Wonder Love wa Mayonaka ni

Haruka Yashiro suffers from insomnia after changing jobs, and part of the reason is his unexpected reunion with Isshiki, the source of his most embarrassing past. One day, Isshiki steps in to save him from a heated argument, and somehow, they end up spending the night together. That night, in his dreams, the demon king Thomas—who looks exactly like Isshiki—appears and they spend a hot and wild night together! In reality, Isshiki is cold as ice and unassuming, but the stark contrast between the dream world and reality leaves Haruka feeling a little confused and overwhelmed...

(Source: Taiyohtosho Company, translated)

Note: Includes 1 extra chapter.