In my mind, this is even sexier if he actually legitimately did not drug her at all. That's most likely not the artist's intention, but a man can dream.
Is this hot milk?
Hmm, well aren't you considerate, aniki.No way.You're just going to force me to have sex with you, aren't you?Really?Huh? "I really just want to sleep"? "I'm tired, little sister"?My hips won't stooop!Hey,
aniki, did youput something into that milk!?Don't fall asleep!Eh? "It's been a while so do you want us to sleep in the same bed tonight"?