[Hinagiku Welcome] She seen as a plain library girl "Hinagiku Kuroko", actually the style is too high. Kuroko has fellings for Suguru Otonashi the same book committee member, but the favorite of Suguru was school idol Moegi. Afterward Kuroko who has confessed to Suguru who was blindfolded, it is misunderstood as Moegi, by a similar voice. [If i'm Moegi-san, it will associates?] Kuroko violated Suguru as Moegi almost every day from that day.

[Nano Welcome] Otonashi Suguru's sister-in-law Shinonome Nano and the best friend Minamino Tsunko called Hinagiku Kuroko to the roof of the school and told what Nano was thinking of her brother. Hinagiku Kuroko denied that thing, but to explain the relationship of Suguru Otonashi, the actually having sex is shown to be consented. While Suguru is blindfolded and thinks that the other party is Moegi, Nano and Tsunko mix and continue to violate Suguru's body.