Diary of the Second Generation of Immortals Traveling in Japan

This is a story about a second-generation immortal whose soul passed through neon due to an experimental accident. His parents are worried, his childhood sweetheart is not worried, and he is worried about the dangerous world. There are many ghosts and ghosts, ghosts and warriors are in power, onmyoji, ninjas, new armies, and Buddhism are all making trouble. What kind of waves can a little man with a bright brain stir up when he enters such a world of cultivation...