A 34-year-old man, jobless, shut-in, and NEET.
On a certain day, after he got kicked out of the house, he met his death in a traffic incident… or so the man thought. Instead, he is reincarnated in a world of swords and magic as Rudeus Greyrat. With the piled regret and experience from his previous life, he swears to live his life earnestly this time around.

After reuniting with his childhood friend Sylphiette at the Ranoa University of Magic, Rudeus marries her and begins a happy new life. But when the time comes to rescue his missing mother, Zenith, he joins his father, Paul, his mentor Roxy, and their companions on an expedition into the Teleportation Labyrinth on the Begaritt Continent. Although they succeed in saving Zenith after a desperate battle against the Manatite Hydra, the victory comes at a devastating cost. Paul loses his life, and Rudeus loses his left arm.
As Rudeus struggles with overwhelming grief, Roxy stays by his side and becomes his second wife. With remarkable generosity, Sylphiette welcomes Roxy into the family. Together with Sylphiette and Roxy, his daughter Lucy, and his sisters Norn and Aisha, Rudeus resolves to cherish his family’s everyday life and protect those he loves.

Meanwhile, time turns back.
After Rudeus was killed and later revived by Dragon God Orsted, Eris comes face to face with her own weakness. Believing she is no longer worthy to stand beside Rudeus, she leaves him behind.
Together with Ghislaine, Eris travels to the Sword Sanctum, where she trains under Sword God Gal Farion, one of the Seven Great Powers, honing her swordsmanship.
All so that one day, she can become someone worthy of standing by Rudeus’s side.