A teenage boy has an alien living inside of him. The alien sometime causes him to say/do perverted things. The alien causes him to act strange in other ways, such as at school and at home. The girl the MC has a crush on thinks he is a pervert because he did/said something perverted to her/in front of her.
Both anime are adaptations of Shonen Jump manga by Studio Pierrot. The main female character hates the main male character in each how, however do to their situation they have to spend time together. The main female character accidentally catches the main male character doing something perverted. Chuuta in elDLIVE has to join the Space Police force elDLIVE. In Twin Star Exorcists Rokuro and Benio are forced to become exorcists.