My girlfriend is Kusunoko Saiki

Naoto Yamashita, a failed art student, traveled through time and space to become a noble Chinese traveler and a Japanese high school student.
Here, his childhood sweetheart is called Saiki Kusunoko.
My best friend is Sakuta Azusagawa.
There is also a strange club in the school called the Service Club.
At this time, there was another rising cartoonist in the comics world named Yajo Mumenha.
However, all this has nothing to do with Naoto Yamashita.
Just when he was preparing to fight for the thirty-year mortgage-
All in all, this is the story of an ordinary high school student's climb to become the top cartoonist in Neon.