Based off the eroge by Valkyria. Your childhood friend, girl who you have feelings for, elder sister, mom, police officer, nurse, twin sisters, class president, pregnant woman, bad girl, bride, camera nerd, homeless woman, a member of rhythmic gymnastics club, female teacher, blind girl........! Rape them all! It is your mission!!! (Source: VNDB)

Dragundaala, a country belonging to the descendants of dragons, has been conquered by an army of demons. With the king and queen captured by the demon army general, Ginyol, princess Catue attempts to rescue them, but gets caught. All is not lost, however, as Ginyol agrees to free the king and queen, and withdraw his army entirely if princess Catue can endure his sexual acts of depravity for 7 days. (Source: ANN)

With the help from a mysterious creature, Elena turns herself into a magical girl in order to beat Zoid, a tentacle monster, and save her sister, Emile. Since then, to protect her sister and to keep peace on Earth, Elena fights against ugly creatures as a magical girl; however, what awaits her is a harsh destiny: immoral days of naughty humiliations, and her battle eventually involves her sister and her dead mother. Can Elena exterminate the tentacle monster, or will she be driven crazy, losing all sense of reasoning to the ecstasy? (Source: DLsite, edited)

DVD-BOX special added to the 3rd volume. It shows the events after the 3rd OVA. (Source: AniDB)