I can't vote this up enough. On a side note, although I can't picture these two falling in love I think they'd make decent friends. Mokou is likely one of the only touhou characters who wouldn't mind Komachi's infamous laziness. And that's infamous laziness from a touhou standpoint, so that really says something.
I'd say the chances of Komachi going somewhere like the bamboo forest to ditch work is possible. Back when I was in school I'd ditch to places that took half an hour or more to go to. Yama-chan likely has a pretty good Komachi-finding skill, so she'd best get as far away as possible.