Manthika

A story about cursed royalty with mood-ring eyeballs, focused on a girl given Tragic Abused Slave Backstory #12, labeled as 'isekai' only because the author wanted to ride the 'isekai popularity train' when it's really no more than 'sometimes I dream that I lived in another world where there were things called 'planes' and 'cars' and I had a little brother' so... I mean, it counts, but not really. 

In "My Three Tyrant Brothers" the brothers are tyrants to anybody BUT the MC, and really, who can blame them?  She's the prophecied chosen one meant to break their curse~ wow, so amaze, much original, very mary sue.  I mean, if the fact that their eyes change color based on mood wasn't enough for you. 

It's not great.  But it's not terrible.  It's bland and slightly below average for what it is.  If you're looking for a cliche, chill story focusing around a kid going from rags to riches in a hot second, look no further.  If you want anything of substance, look a lot further... Like a lot.  Don't get me wrong, I like it, it has some cute family interaction and such, but it just doesn't excel or wow in any way.