For the Good of Us All

Hermione has finally managed to corner Harry and convince him to listen to her plan. "Harry, going back in time to save Tom Riddle before the monster envelops the man is the best plan we have. It's for the good of us all." AU where Sev and the Marauders go to school with Tom UNDERAGE warning for the barest of sexual encounters between an 11 and 12 year old