What Should I Do If I Transformed After Time Travel and Brought an Invincibility System with Me?

An ordinary man died unexpectedly and traveled to a world with underdeveloped entertainment. There was Academy City, Aresia Elf Academy... And he became a lolita who could transform into a female anime character. He could also get various skills and inheritance systems. Let's see how he becomes stronger. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.