Funny

Turn your brain off, 3 days from exam decides to go to secret realm ok, learns about his team mates ability then instantly sets off to the secret realm. Once in the realm apparently Mc had enough time to create blueprints to a fully functional robot for his teammate to produce like when did he have time to do that he just learn of his teammates ability. He has been in that world for 4 days, or 40 days of physical training.

Pretty good, but the main character seems to be getting increasingly racist and insane over time to an almost disgusting point. But i suppose thats normal.

Could have been better if the main character was more none existent. The main character as a system chose a host who was apparently a very intelligent villain. But proceeded to make the host dull and have the system/Mc constantly have to give directions. If you want a non-existent MC i would recommend (COMPREHENSIVE MANGA: THE WANDERING NINJA WORLD STARTED FROM QUESTIONING PAYNE)

Too many time skips