Hm... kinda yes and kinda no?
It's not harem. Theres no multiple love interests in one world. And most worlds there isn't even one.
But I can tell you this isn't the kind od 1v1 where mc goes to countless worlds and 1 ml follows her everywhere.
But... there has been some hints that maybe the ones she chooses to spent a lifetime with might be the fragments of a certain someone... but they all have different looks and personalities so it can be seen as multiple mls.
But lets be clear. This is not a romance comic. Mc's objective is concluding her missions using the least amout of tools (cheats) she can so she can get a better score and not find romance in those worlds.
So if you are looking for world-hopping romance with same ml in every world with romance being a big part od the plot... I don't recommend this. The romance is very sub-plot.
Revenge and a strong and smar mc are the main focus here.
Does this story have multiple love interests? I've been wanting to read it but I read somewhere (forever ago) that there's multiple MLs. I wanna read it but reverse harems/love triangles/multiple love interests throw me off.