Comment by ෆ_Da Tenshiii_ෆ on The S-Class Guide as Sweet as Honey - Chapter 57

Blondie's brother--the guild's former Guide--was lost in the SS dungeon ten years ago. He's still there. He's the "what" they're trying to retrieve.

If I recall what someone posted before, our black-haired Guide is going to misunderstand and believe that the retrieved Guide is Blondie's lover, not his brother... and we all know what happens in those cases.

Im so annoyed tho if shi gets stupid like this 
This bl's kinda dragging it out i hope they dont make a bad ending

...it's a happy ending. They just have some major bumps along the way--Andante realizes (while he's in the dungeon) that he really does love Hyoseop, but Hyo witnesses him with the other guide in the dungeon (since the whole thing is being broadcast), believes they're in love, and runs away. Andante chases him halfway across the world, tho.