R*pe Pr*Cure BADEND! / Изн*силование предвещает ПЛОХОЙ КОНЕЦ!

Miyuki had a young boy neighbor who she thought as her oniichan. However, instead of a brotherly love, he let out a burst of sexual desire on Miyuki's young body, again and again.
http://www.dlsite.com/ecchi-eng/work/=/product_id/RE106413.html

"I want to know... the good feeling of a chin-chin..." Yayoi K*se is made to drink a bizarre drug called "Silitacnal" by her OB boss. She naturally becomes curious about things. A girl of her age, boy parts and ecchi feelings, and then...
http://www.dlsite.com/ecchi-eng/work/=/product_id/RE106434.html