Douzo Oishiku Meshiagare

Ibuki, a professional home cook (personal chef) who supports daily dietary needs, receives a request from Wanibuchi, a surgeon, to "make dinner for his son." From that day on, Ibuki begins visiting the Wanibuchi household, but there seems to be a deep rift between the expressionless and unreadable Wanibuchi and his son Riku, a high school student model and arrogant man, and it is a father-son household where the two barely exchange words. Nevertheless, Ibuki gradually becomes attracted to Wanibuchi's kindness, who cares for his son despite his clumsiness. Then, Riku forcefully kisses Ibuki and makes a sincere advance...

(Source: Gentosha, translated)

Note: Includes one extra chapter.