Oikatzu
Here's a full story draft based on your idea:
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Title: "Rebirth of the Light: Haruko's Destiny"
Synopsis: Haruko Tachibana, a 30-year-old overworked salaryman, dies from exhaustion at his desk. When he wakes up, he finds himself in a vast, star-filled space face-to-face with a mysterious but warm-hearted god. The god informs him of his death and offers him a chance to be reborn in a magical world. Haruko is given two options: live a peaceful life in this new world or become a powerful individual destined to save it from the threat of the Demon King before he turns 18.
With no attachments left in his old life and a kind heart that still wishes to help others, Haruko chooses the path of the hero.
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Setting: A fantasy world where everyone is born with one of seven magical powers-Fire, Water, Wind, Earth, Ice, Darkness, and Light. Light is the rarest and most powerful. Most people can only use one element, and only a handful ever awaken a second. More than three is almost unheard of.