Comprehensive Manga: the Opening Was Experimented with Kaneki Ken

Hanyu Xuan traveled to a comprehensive world.
There are ghouls in this world, there is the Togetsu Saryo Cooking School, and among the neighbors of the Hanyu Gen family is a little boy named Hikigaya Hachiman.
After years of hard work, Hanyu Xuan has become the ninth seat of the ten heroes of Togetsu Academy.
Just when he was about to climb to the top of the cooking world, a man-made car accident brought him into the General Hospital of Kaana, and together with Ken Kanagi, he was transplanted with the internal organs of Risei Shindai by Kaana Akira.
Unfortunately, Akihiro Kaana's experiments on Gen Hanyu failed, and he was about to die;
Fortunately, Hanyu Xuan unscientifically survived, and thus embarked on a path of immortality that is incompatible with the Japanese comic world.
After that, Hanyu Xuan even made a luminous dish that could change the fate of the ghouls, and by doing so, set off a storm in this world...