Uihara relieves her stress by passing judgment over a virgin

Kuroko ties up and mostly strips her beloved onee-sama and grows a penis so as to properly claim her.

Kuroko loses it and resorts to memory manipulation and gang rape to see her oneesama's private faces...

Also by the same artist who did Lovematio: a Toaru Majutsu no Index doujin about Misaka coming to an esper who can help increase her bust-size, though he has something else in mind...

Ultimate perverted Kuroko test out a her date rape techniques first on an unwilling Uiharu, and then uses a date-rape drug on her beloved Oneesama when caught in the act.

Taka confesses to Haruka in front of everyone ... and is rejected ...