The manga starts with a familiar setup - a bullied, weak protagonist - but for me personally, it shifts into something more engaging. The main character Yuuta, skips Dungeon High School and dives into a dungeon on his own when he turns 15. The world- and characterbuilding seem solid, I can see them deepen as the story goes on. The dungeon mechanics feel well thought out, making me look forward to the exploration aspect. Ten chapters in, there are some hints that make it stand our from similar stories. If you enjoy fantasy adventure manga, with a strong growth arc, and some romantic subplot (stillnot clear if it is going to become a harem or not) i think this manga is worth a shot.
I gave it a 7 because objectively some people may be bored already with this type of dungeoning, adventuring trope. It is not wholly unique. On the other hand, if you like this genre, I can see the potential for this manga to be at least an 8 or even more.