The hero who reincarnated in a different world raises his twin sister, who was born together, by making use of the knowledge of the previous life. At first, the hero does his best while studying desperately, even though he can’t even understand the language! On the other hand, my sister is a genius beautiful girl and grows up with more momentum. But escalating more than that, love for my older brother ♪ …… Can I really lead my sister in the right direction? I will take a closer look at the struggle from the age of 0 … I will send it to you. By the way, brother and you are usually growing in a strange direction, aren’t you?