This is Tokiwa-so, an apartment where aspiring female erotic manga artists gather. However, Wakamiya, the editor in charge who was troubled by their immature expressive power, takes a strong measure to make them learn real sex by using one male editor as a guinea pig and having him experience various erotic acts! Using a big-dick super-enduring editor, they take pictures in various positions and take notes... The passion to want to draw more and more skillfully realistic erotic manga does not stop on that day, and each of them sketches the hard-standing dick for study, the way breasts shake, the thread of saliva from fellatio, the way sperm comes out at the moment of ejaculation, the way the sperm drips after creampie, transparent oil massage and irrumatio! Chinguri riding position piston! Masturbation! Everyone lesbian sex!!! etc... And finally, a big gangbang sex!! Will a best-selling erotic manga artist be born from Tokiwa-so with intense training?!