Premieres Fall 2024. Check out the ANN article for additional information. Synopsis for the fifth season from AniList:
Goddess Festival—A fruit festival that brings the labyrinth city of Orario to life. Goddesses symbolizing fertility are enshrined on the altar, and among them is the Goddess of Beauty. Bell Cranel, who has survived and returned to his daily life from the dead depths of the dungeon, is here and ready to enjoy the bustle of the Goddess Festival until he receives a letter from a girl at a small bar in a corner of Orario—"To Mr. Bell, please go on a date with just the two of us at the upcoming Goddess Festival. From Syr." Syr's single-minded determination will drive both Bell and the labyrinth city crazy. Meanwhile, the Einherjar, the warriors who claim to be the "strongest," are now suddenly on the move...
Season 1 had a tried and true underdog cast that had to work hard and struggle and get by on luck, the scenes were packed with action, tension, and high stakes. Then, he had several chances to prove himself and grow stronger. After season one, it just became a sort of shallow political drama with tens of characters being given screentime to do nothing but talk, and a bunch of foreshadowing that the supposed underdog is some kind of demigod or something. Basically devolved into an excuse to draw far too young-looking girls in the lewdest situations allowed in the show's rating category.
I didn't watch 3 or 4 and I don't intend to. I'd rate the show overall as a 0/10.
I didn't like Season 1 as much, I think because the story was scattered around introducing so many characters. I also agree that ecchi is a turn-off for me, but I liked the concept, characters, and production value enough to stick with it.
I think the strength of the 3rd season onwards is that it relies more on the established cast, rather than introducing a ton of new characters all the time.