Tadaima Shinryakuchuu!ただいま侵略中!; 现今侵略中; Tadaima Shinryakuchu!; ただいましんりゃくちゅう!; 宇宙少女侵略中

Yuki is an herbivore high school boy who ends up living with Muir, a rugged, sloppy, erotic, and cute math teacher, and female alien. In fact, Muir's aim was to acquire Yuki's excellent offspring with infinite possibilities and invade the earth!?!