1+2=Paradise

is a Japanese manga series by Sumiko Kamimura and published by Kodansha's Monthly Shōnen Magazine. A 2-episode OVA by Toei Video was released in 1990.

The manga compiled up to 5 volumes due to Kodansha discontinuing the series as it was branded as one of the "Harmful manga" for its sexual content by local and national governmental agencies.

Plot
When Yusuke Yamamoto awakens from a nightmare in which a demon warns him that women will be his downfall, he discovers that real life isn’t any better! Having a gynaecologist as a father, the poor boy is under pressure to overcome his irrational fear of women, and feisty Nakamura twin sisters Yuka and Rika are on hand to give a helping hand. Using any method they can think of to seduce the red-faced boy, the racy competition soon heats up as busty Barako bounces onto the scene with an equal determination to seduce Yuusuke. Which of the horny heroines will win his heart, and more importantly, will he survive a non-stop onslaught of naked breasts, panties and bondage?