it's about a scientist who is killed and reborn into the past he date the younger sister of three sisters bty it's in another site can I get help? (I'm shameless and I know it)
Wait is it the one where he is bought as a slave to do the sisters homework, cause I remember her being the youngest sister, and she did have an older sister. I think it was called Miracle Throne, might not be the one you want though cause I don't remember it being R18.