The Otherworld of Gaia Brand, S-Rank Difficulty
The twisted Gaia Brand, with S+ difficulty, and Ixphoria, with SS difficulty.
The unbelievably cautious hero, Seiya Ryuguuin, successfully saved all three of these extremely difficult worlds.
The healing goddess Ristarte will summon this cautious hero once again to conquer a special otherworld.
(PS: Though I say conquer, it's not quite the same as usual.)
(The author is a beginner. I wrote this because I like the character of the cautious hero, so please be kind.)
Planned arcs: Black Bullet, Re:Zero - Starting Life in Another World, and Date A Live.
It's best to have read these three before starting.