When going back home from school in the usual train line, Miyu's breasts are groped by a train molester. Shun, her classmate, appears and saves her. He walks her home and teases her about the chikan groping her breasts. He also kisses her. Miyu runs off to home. The truth is, however, that the train incident was all a cunning trap plotted by Shun. Back home, Miyu regrets having her first kiss stolen. Then, Kou, her childhood friend, appears and, due to Miyu losing her key, takes her to his home. There, Miyu confess her first kiss was stolen. However, Kou tells her they have already kissed, so it was not her first kiss.... That night, Kou takes Miyu's virginity. The next day at school, Shun apologizes and invites her home. Miyu accepts, not knowing is a trap. There, Shun drugs her and trains her as sex slave. She resists it at first, but after that day, when she remembers that, she starts masturbating. Did she actually like it, and does she want more? What about Kou?

Arisa and Mika Nanase are sisters and the school super-idols. They are the hottest and cutest girls in the school. Sousuke is a normal student who like the rest of the boys, can only look at the super-idol sisters from afar. Sousuke likes Arisa but can never hope to even speak with her. One day Mika tells him she want to speak with him after school. Later, he meets with Mika and Arisa and they reveal that they have now become siblings! The truth is that Sousuke's father, an adventurer, and the Nanase sister's mother, an archeologist, met at an excavating ruin in South America, fell in love, and married. Mika, Arisa, and Sousuke are now siblings and will live under the same roof from now on. Sousuke now has to be careful to not get caught masturbating by Mika or Arisa ...or maybe they might just give him a helping hand... How about taking a bath with Mika? ...Siblings do bathe together after all...

Miwako Shirasaki is hired by her schoolmate Ai to work by her side at a maid cafe. But none of them know that somewhere in Akihabara an underground organisation called "Maid masters" abduct young waitresses to confine and rape them...

Kouta is the school's idol loved by all—his teacher and his fellow students. Well, at least the one teacher and three students we see—who are all girls. Actually, they don't actually "love" him all that much; they just want to screw his brain out. (Source: AniDB)