Kijou Masaharu

Mami's brother and Moeko's childhood friend. When he witnesses Moeko transform into Moerin he is drawn into the secret life of magical girls, villains, and evil beings trying to take over the world. He meets Midori and discovers that his sister's friend Rin is also a magical girl. Soon thereafter the strange weirdos Enbi-fuku Kamen and his sex slave/magical girl partner Mesu-dorei A-ko move into his home to give him tips about how to care for magical girls. Their adventures involve lots of sex.