I'm Obito's Father, and I'll Give Him a Happy Ending

Two protagonists, one heroine. Some details will be changed. The System appears infrequently and won’t hand you a Rinnegan that makes you invincible; it only provides support. The protagonist mostly grows stronger through his own efforts.

I’ll become Obito’s father, give my child a happy ending, have Rin marry Obito, and make Obito a genius.

I’ll become the strongest in the shinobi world, unite the shinobi world, and become Hokage.

“Obito, whatever you do, I’ll always have your back.”

Obito: “Thank you, Father.”

Madara: “Wait, I’ve been played. Yexian, you bastard!”