Responses
Going to need more info than "like this" to recommend you something vaguely similar (this manga is relatively unique) - do you have any criteria in mind?
In the mean time, here's one that involves two siblings getting on (platonically): http://www.mangago.zone/read-manga/cheerful_countess_sisters/
Can you guys recommend me more mangas like this!!! It doesn’t have to be with twins, but it’d be a bonus if it was!! Please and thank you(づ￣ ³￣)づ