Please Twins is about Maiku Kamishiro he grew up in an orphanage but finally found his own place one day this girl shows up and claims to be his long lost twin sister…later another girl shows up claiming to be his twin sister one problem there is a photo with two kids one boy and one girl, one of the girls is his twin sister and the other a complete stranger.
This anime has a bit of nudity every now and then so it's more for the mature audience.