Takaki Kozuki is a seasoned software coder who's afraid to take chances. Yuichiro Kunieda is good-looking, half-Caucasian, and super-serious. He's introduced to Takaki as a new addition to the planning department and they start working together. Contrary to his lovable looks, Yuichiro doesn't make friends easily because of his excessively square ways, but for some reason, he's taken to Takaki. Takaki is also fond of the younger man for his sincere attitude. One day, they go out drinking with colleagues, and Yuichiro gets terribly drunk. He leans in and kisses Takaki before he can figure out what's happening...