This is by far the most tiresome isekai I've ever read. The MC's schtick has long since gotten old. The author has one joke and it's long since worn out its welcome.
"OH GEE GOLLY ARE YOU TELLING ME THIS GIGANTIC EARTH DRAGON IS ACTUALLY SUPER VALUABLE? AHYUK WHO COULDA GUESSED! SHUCKS WHO WOULD HAVE KNOWN THE GUILD WOULD BE SURPRISED THAT I HAVE 30,000 DEAD ENDGAME MONSTERS IN MY MAGIC STORAGE! I'M JUST SO NAIVE AND SILLY LOL"
alternating with
"OH GOSH I'M SO SCARED OF MONSTERS EVEN THOUGH I HAVE AN INVINCIBLE GOD-WOLF PET WHO'S THE KING OF ALL MONSTERS, BETTER PISS MYSELF FOR THE 40TH TIME"
Even edgelord isekai are less irritating than this crap.