Leftovers Day is a Manga/Manhwa/Manhua in (English/Raw) language, ACTION series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is
Cheon-suk, who was the best chef in the world, was exiled to earth!. In order to return to the heavenly world, he takes up a new job as a high school nutritionist to treat the princess who is attending school on earth.On his first day in office he discovers the ‘Kang Wind’, which has been lost due to a wild boar disturbing the spirit of the mountain, and cheon-suk corporates with the wind to defeat the boar.Afterwards, peace comes to the school for a while,and rumors spread among spirits of the nearby mountain,and more people come to cheon-suk to ask for his help.Cheon-suk fulfills their request and finds a way to cure the princess illness.