I Use Observation Haki in Konoha

In a world of ninjas where blood theory and geniuses abound, Ding Ping is off to a hellish start as a fat taijutsu ninja with a chakra utilization rate of only 15%. Fortunately, he has the ability template of Kaji from the Big Mom Pirates, but Kaji's style and puffiness are natural enemies, and the road to becoming a ninja will not be smooth sailing for the protagonist. Ding Ping will practice physical skills, use the combination of Qiudao family's doubling technique + Nuo Nuo fruit to improve his strength, and use his knowledge and domineering power to predict the future and change his destiny. From the ninja school to the chunin exam, to fighting Pain who came to carry rice, and then fighting against Konoha Dance King Uchiha Madara, many bosses of the Otsutsuki family. Fat House will eventually find his own invincible path💪(≧ω≦) The combination of Katakuri's Haki and Akimichi's doubling technique, and the contradiction between chakra black hole and energyization are present throughout, making the battle repeatedly jump between social death and high light.

This is a very good anime derivative fan novel with a smooth plot.