Ten de Shouwaru Cupid (てんで性悪キューピッド) is Yoshihiro Togashi's first manga series published in Weekly Shonen Jump from July 24, 1989 to March 12, 1990 (consisting of 32 chapters) and was also his first manga SERIES (only one shots before) period.

*The following is quoted from Wikipedia.*



The storyline of Ten de Shōwaru Cupid follows Ryuji Koinobori (鯉昇 竜次), a sweet and introverted 15-year-old who lives with his four stepsisters and their father, the leader of the Koinobori yakuza and promiscuous playboy by heritage, just like his own father, grandfather, and so on. Ryuji's family has a tendency to make fun of his innocent nature, causing the boy to continuously try to run away from home. After escaping one day, Ryuji witnesses a beautiful girl with a devil tail bathing in a forest pool. Embarrassed, Ryuji returns to his home only to be confronted by girl the following day. As it turns out, this devil girl named Maria was hired by Ryuji's father to live with them in order to t…