In the 5th episode of the 2nd season of The Quintessential Quintuplets, the quintuplets' father says he hates Futarou.
Why does he hate Fuutarou? He seems to have met Fuutarou before and know about Fuutarou's dad, so I wonder whether the reason has something to do with Fuutarou's family. Does he have a bad relationship with Fuutarou's dad?
B - From here which sorta spoils the manga (which I haven't read)
The Uesugi dad and the quints' stepdad are old friends
but the above is I guess already hinted at anyway in S01E08 at the start when Fuutarou points out that their dad was the one who got Fuutarou the job (and even S01E01 when Raiha tells Fuutarou that their dad got them the job I guess).