It's odd what can stick in a person's craw. Like (ahem) a lady removing her glasses or (bows head in self reflection) hair decorations staying in even when a character is getting ready for bed.
Whatever gets a male hentai protagonist to wake up and see that his childhood friend has the hots for him is a good thing as far as I can see. The weekly hookups will quickly make up for a few early bruises.
Ooh, Vanilla and Osananajimi, nice.
Haha, he saw a chance to tease her a bit and played along, but then it would appear she knows her Hentai situations too well and her imagination started running wild...Then he kind of lost his chance to back out until it was over and got decked in the face. Well, I'm sure it was still worth it, though.
Great ending. Ah yes, a happy ending indeed.