FFF-Tier System, SSS-Rank Wife

Transported to another world, his fate becomes unexpectedly and dangerously altered. When a classroom is simultaneously transported to a new realm, one student is placed on a significantly different trajectory. Instead of receiving power from a grand System, he encounters a divine entity and is burdened with an FFF-Rank Failure System. Further exacerbating his bad luck, a crucial bug during the system's activation throws him directly into the world's core, a perilous territory filled with the deadliest monsters. He crash-lands not into safety, but into the grasp of a Tyrant's Puma. However, within this dire situation, a hint of hope, or possibly a fated meeting, breaks through the gloom. A remote light appears, carrying the significance of a shared destiny. Who is this mysterious individual, watching from above, a smile on their face?