新妹子的魔王

Tojo Basara, a high school student who thinks he is just average, one day his father Tojo Shun said, "————You said you wanted a sister, right?" Did his father decide to remarry? And the two new family members, Naruse Mio and Naruse Maria, seem to have some secrets hidden from them? "Sorry, Basara, please get out." The "sister" sitting in the living room with a cold expression ordered him to leave, and next to her was... Maria who had grown devil wings? What's going on? !