Zenjidou Kyousei Nakadashi Room e Youkoso! -Sagarake Sanshimai no Tanoshii Sexlife-

A full automatic animation about the sex of three sisters.
Kanade, Aisu and Miki were all in love with Kanade's private teacher.
Their idea of how to get him was a bit radical: the sexual relationship with him with the help from the automatic sex support machine advertised on TV should be the way!

[From DLsite English]