[Crossover] My Monthly Life as a Ninja

As a transmigrator who has awakened a System, the only way to survive is to clear one of the beginner missions... Which should I pick first? A: You're a little Hatake Kakashi. You have to transfer to Fuyuki City and get back the dojo your dad sold within a month. But it's now the Emiya residence, and gas explosions happen there all the time. [Fighting, Mystery, Magic] B: You're a little Senju Hashirama. In Hachihara, you find a dying, white-haired uncle with three marks on his face. You have to become his brother within a month and avoid getting killed by your boyfriend. [Romance, Mystery, Monsters] C: You're Itachi, supposedly on the run after committing murder. You have to help Detective Mori find the truth within a month, but you've lost your memory and discovered you can turn into a crow. [Deduction, Mystery, Supernatural] Wait, why does every mission hint include the tag "Mystery"? Theme: The persistence to keep seeking the truth