adding on to this: the Thanatos Night series has a similar plot and is also made by Rejet if u haven't heard of it already. it takes place in more of a school-type setting 👀. the most gut-wrenching ones imo are definitely vol. 1, 3, 4, and 6. vol. 2 will kinda break you out of the Feels tho...
speaking as someone who has a sibling, i could not imagine myself ever enjoying this trope when it's between full blood relatives tbh. it doesn't gross me out nearly as much in the case of step-siblings tho, specifically if there's not a super creepy age gap and the relationship is established...