Yang Haru was a normal looking, XXX-L sized girl with self-esteem issues until six Mato aliens come knocking on her door. Now she's their Earthling teacher, she teaches them the how to live the life of an earthling and in return, they bring color and sparks to her dull grey life. "Haru-yah, lets talk about mating!" "Zelo-shi, shoot Himchan." "That would be my pleasure."