An interesting title.
Nothing like the promise of listening to anything he wants to help a man get a good score on exams.
Also, what a champ, recognising it's hers just from the smell. That's some true love right there.
Seems like she is more of a pervert than him if she has been using the toy while at school. Overall, very cute and hot, also feels like it should have the Vanilla tag.
Another time, place and artist, by the time page 20 rolled around, Youta might have been shopping for a new girlfriend (once in a while, one should abide by the lady's request, if she says "No"). Alternately, he could've ended up bound on the bed, nude from the waist down, and Suzuha could have had the toys in hand, ready and willing to go: "It's Payback Time!" on his ass (figuratively and literally).