Something is wrong with history. There was a huge war that nobody can really remember, and a massive number of people are said to have died in it. Clues to this mystery arise from an unexpected source when Naoya and his brother meet a woman who went to school with the mysterious Shoko Futami...
That's why you have to learn 
something very important.
لذا عليك تعلّم شيء مهم جدّاً
por eso mismo
debes aprender algo crucial.
por eso mismo
debes aprender algo crucial.
proprio per questo devi imparare una cosa fondamentale.
Por isso você tem que aprender
algo muito importante.
Поэтому тебе нужно запомнить
 кое-что важное.