The Dungeon, the Gal, and the Saga of the Lagging Heroic Explorer

Kaoru Kunou, a former legend known as the "Dungeon Maniac," is now, for certain reasons, a bottom-tier explorer. Though worn out by reality, he continues to chase the fleeting dreams and youth of his past. One day, by chance, he saves S-class gal streamer Shion from a crisis, and she falls for him at first sight. Initially flustered by Shion's overwhelmingly bright and charming advances, Kaoru gradually warms up to her.