I see no problem with there being males. Actually it is rather refreshing. If we exclude the "X rated" content its your standard browser Anime RPG.
And yes they are stronger in the beginning and fall off later on - should you stick with that game long enough that is (we are talking FKG DMM/Nutaku Later). Also they are FREE to get from the Mancha gacha and offer some very nice power to the player. Especially Schwartz and Shien (and eventually Mikoto as well), good for Raid bosses.

So what was the requirement for the FKG reward part of the collab ? 1800 on Re-Issue or something ?