The protagonist dies unexpectedly and transmigrates into the world of Doraemon, becoming Genichi Kudo, a classmate of Nobita Nobi.
Things go wrong from the start. His original body's parents died in an accident, leaving only his younger sister, Ayako Kudo, to depend on him. And in the afternoon before the protagonist transmigrated, the original owner had fallen off a cliff and was on the verge of death. [By the time the transmigration happened, it was already night.]
At the critical moment, the protagonist binds to a stat-boosting System, which can unlock a vast talent tree. Doraemon's arrival also manages to keep him alive.
But the crisis isn't over. What do you mean his parents' accidental deaths were deliberate? A mysterious organization is hunting him? His childhood friend wants revenge on him? Don't give me this kind of trouble on a new account!
This is a Doraemon fanfiction. If you don't like it, feel free to skip it; please don't flame. It has one female lead, Yao Sato, the childhood friend of the protagonist's original body.