The science club girls are intern advisor Tachizumi's hentai test subjects......! Culminating in a scene of shrieking orgasmic birth!

Entrusted as a special science advisor, trainee teacher Tachizumi (protagonist) noticed something odd about the students.

Every one of the girls in his lab was struggling with a burden in her heart.

Tachizumi proposed that they solve the problem scientifically... but his lewd "experiements" were a clever seduction technique...

[From DLsite English]