I think the continuation will be the side stories. And honestly no fluff, Season 2 itself is the fluffiest. The possible extras would depend because the novel have a ton of extras and some are fluff but mostly more suffering
SPOILER ALERT :
There's actually a total of three timelines, the first one is the original them where ALL OF THE SUFFERED, the second one where Aeroc is the only one who remembers their 1st life which is Season 2 of this manhwa and where this officially ended. And there's the 3rd timeline where only Kloff remembers there original past (my favorite timeline) Kloff planned his encounter with Aeroc brick by brick just to get close to him, Aeroc's proud and untainted self( you'll understand if you finish the 3rd timelines novel). Kloff suffered in the last timeline (which in my opinion is not enough) but it ended well atleast.
╥﹏╥ The novel actually have a lot of extras which include a scenario that what if Kloff forgave Aeroc in the first timeline and tried to live like a family with their five children (which is pretty f*cked up in my opinion). Also beware of Martha, that B*t*h I hate her so much (╯°Д °)╯╧╧
For the people who read the novel. After this new timeline will there be anything else ? Maybe a timeline with more fluff like the 2nd one ? Bc im thinking of reading the novel if yes