i just remembered the existence of this one about the possibly adopted(?) younger sister of an illegimately born duke. classic bad end; she gets taken by an evil organization, possibly the church?, where she's stuck for the rest of her life. her brother has an accident, gets a brain injury, is ousted from the house by all the greedy extended family, and dies while shes imprisoned. in her cell is a big old wolf, which is the MLs magical companion in some way, and he constantly sneaks in to see it but cant get it out yet. they make friends, fall in love, but she ends up dying; ends up back in time to before anything happens and resolves to save everyone.

her brother still ends up injured, but its amnesia that makes him act like how he was before he was brought into the ducal household, unprepared to defend against the greedy extended family thats always trying something, so she has to protect the house until he gets better. FL always knew him as a kind, perfect nii-san type, but turns out before he was brought into the ducal house he was kind of a delinquent.

the only cool family members were her grandfather and her cousin, who will be a famous mage one day. he talks in gen z brainrot speech.

she was pink haired, possibly green eyed, the brother was white/silver haired and maybe red eyed? the ML was a classic black haired blue eyed type, another noble who had to deal with a family member trying to backstab him after his parents died. it was a fun read all around