We're Childhood Friends but We Want to Kiss

Haru is shocked to find out that his childhood friend Kyoya has suddenly transferred to his workplace. Even more surprising, Kyoya reveals that he made the career change because he's in love with Haru. Thinking it’s just a joke, Haru is taken aback when Kyoya seals his words with a kiss, making it clear he’s serious. From that day on, Haru finds himself on the receiving end of Kyoya's intense advances…

(Source: Kadokawa, translated)

Note: Includes one extra chapter.