@NamelessSoldier@nachtness I guess I will go with your explanation then. The author certainly love the smart girl kid stereotype. We have the painter girl, the one where the parents want to divorce, but she prevents it and the negative number girl on top of my head.
@d_a_renoir I only remember the one where they time traveled to the past in a blizzard at sky lodge and also where Shinra went to an inn which to meet guy which was actually a yokai.
@nachtness Sorry those characters are from his Q.E.D. manga.
The painter girl=https://mangadex.org/chapter/651909/
The negative number girl=https://mangadex.org/chapter/555822/
The almost divorced parents one=https://mangadex.org/chapter/626746
Would be better if guy at least once tried to just walk away before drilling his tooth and it didn't work. I'm pretty sure I wouldn't want to repeat it endlessly without even trying to stop before.