How are they supposed to go back to a "friendly" relationship after this? Something like ear cleaning is supposed to be intimate when done by family members. But add all the praise and compliments from Miku, it becomes something very romantic. And now giving gifts and hugs? Yukiya's right to feel so happy at the end there.
I'm serious in the hope they start real dating after this. That blurb at the end has me optimistic that at the very least, the both of them will extend the "fake dating" trial period.