My favorite character is definitely Yasu, he has this mistery genius vibe, but all the guys have great chemistry together.

And the story's concept goes beyond a culinary school, it's more about Sakai, the protagonist, how he feels the most alive and useful when everyone enjoys his food.

I wrote a review here, if you're interested: http://www.mymangamarathon.com/2015/05/yaoi-manga-recs-recipe-no-oujisama.html