This is a drama about what happens when your passion is extinguished then re kindled in a different direction.
Gaku is obsessed with maths. His way of comprehension is depicted in visual fx so we can see the complexity of his thinking. When he can no longer believe that maths alone will bring him to the pinnacle he was aiming for he is devastated. Enter the 2ml Kai who is looking for a genius successor. He challenges Gaku with more and more difficult culinary challenges and each time Gaku breaks through his own beliefs of limitations to create stunning food results.
Gaku is a pure soul and others are attracted to him and support him. There is an underlying problem with Kai that he has hidden and this has a profound effect on all the main characters.
Each actor stays true to their character and enough time is spent on revealing the back story of Kai to ensure our sympathy.
Gaku is now obsessed with Kai's goal and this drives him in a way that alters his basic sweetness to become a driven person who is unable to relate to those around him, leading to the inevitable alienation.

The ending is lovely after all the angst and a hint of bromance shows our to MLs encouraging each other in a supportive. caring environment.