Oppai Heart Episode 1

Synopsis Oppai Heart Episode 1: Ryuya has an older sister, Miya. He lives a peaceful school life with his friends. But one day, he and his friends accidentally drink a medicine juice. Once you drink it, you’ll become sexually sensitive and get excited. The breasts of the girls who drink it will get bigger and they will need to have sex to cool down. Also, to make a vaccine, they will need to get pregnant. Ryuya starts having sex with the girls to cool them down and make a vaccine.
Alternate Names: おっぱいハート～彼女はケダモノ発情期ッ!?～
Aired: Oct 28, 2011 to Feb 24, 2012
Producers: Nihikime no Dozeu
Source: Visual Novel