This Hero Is Invincible But Too Cautious (for offline reading purpose)

Lista, a Goddess from the God’s realm, has a huge task to accomplish. She must save the world Geabrande (with a S-rank difficulty salvation) from evil threats. To perform this task, she summons a hero from Planet Earth called Ryuguuin Seiya. This hero is exceptional and fully capable, but has one major problem: he is unbelievably cautious. (note, this is not mine, it's only for offline reading purposes) source: https://bestlightnovel.com/novel_888141268