Tsundere Itoko to Koakuma na Mei ga Kawaisugiru no de, Ero Kyouiku Shite Haramasechau Ohanashi

For some strange, sudden reason Hideo Shijou is sharing his bachelor's pad with a cousin and niece he just met. In a cramped one-bedroom there's no way to resist his urges! One girl is serious and moody, and one is teasingly naughty. Fiddle and fawn and, gradually, exploit the bishoujos. A fun cohabitation life of JK incest is waiting for you.