Three years after the original series, Tenma is sixteen and Raimon is in High School. Some players have matured a bit. Others... not so much. Fei, who is also sixteen now, is using a time machine to visit them whenever he feels like it, so it's normal for him to suddenly show up. But he's also picked up the habit of messing with time machines, which normally doesn't work out all that well... One day, it goes horribly wrong and one of his machines explodes. Tenma is caught up in the blast and is send to the day he joined Raimon. Since there's not much he can do he just decides to 'go with the flow' and relive the whole series... only this time, he has two things he didn't have in the normal series: Knowledge of the future and this little handy thing called common sense. And, not to mention, a thirst for revenge, since his future teammates cause way too much trouble. Watch out, Raimon, because the insanity is about to start!