If you are reborn, you must live a chic and perfect life. Please see how the 21st century otaku created his perfect life after returning to the past, how to use the extra decades of memory to create wealth, and how to transform his body and brain with alien technology Afterwards, he became the existence of the real strong. Reader group 1: 53110372 (full) Group 2: 33495750 Group 3: 8933902