KIL-004 — My Younger Sister Has Been Getting Sexier Lately, So I Used Her As A Test Subject For An Aphrodisiac And Played Around With Her, But It Worked A Lot Better Than I Expected And She Ended Up Attacking Me Instead...!

■Sayaka My sister is so vulnerable that she unconsciously flashes her panties while sitting on the floor/She doesn't even notice when her panties peek out while sitting on the floor, she's childish and vulnerable, but when I give her an aphrodisiac, things take a turn beyond imagination! ■Azusa On the day my parents went on a trip, I was alone with my step-sister/The day my parents went on a trip. My step-sister's breasts have recently started to develop and she's started wearing a bra, so I gave her some tea with an aphrodisiac in it...■Yui My naive and shy sister begs to be creampied/I gave my shy sister, who is always blushing, an aphrodisiac and played her some adult videos, and not only did she start masturbating, she even creampied me! ■Karin My normally plain and quiet sister becomes super slutty after being d**...! /My sister is plain and inconspicuous in class, and her only redeeming quality is her studies. She seems to have gotten a boyfriend recently, and she's become strangely sexy...