World-Saving is a Skill Manhwa
The Return of the World Savior / 세상도 구해본 놈이 잘 구한다 / The One Who Saved a World Before Will Be Best at Saving Another / Salvation is a Skill / Saving the World is a Skill / Guwoneun Seukirida / Cứu Thế Là Một Kỹ Năng / Sauver le Monde est une Compétence / Salvar el Mundo es una Habilidad / Salvar o Mundo é uma Habilidad / Menyelamatkan Dunia Adalah Keahlian / 구원은 스킬이다 / 救済はスキルだ / 救世是技能 / Спасение мира — это навык / إنقاذ العالم مهارة

After saving another world, a man returns to find Earth in an even worse crisis. Having saved the world once before, he believes he can do it again.