The Reborn Witch: A New World of Magical Girls

Multiple heroines + lightning + nearly invincible

Using the great art of time reversal, he transformed two ruined old worlds into a brand-new pair of worlds with bright futures. But after being reborn, he was abandoned in a river by his own parents as a baby. After drifting for a long time, he unexpectedly encountered his ex-girlfriend from his previous life. Seeing an abandoned baby inexplicably floating in the river, she was moved by her innate kindness, climbed into the water herself to save him, and took him home, becoming his new mother.