Resized to 78% of original (view original)
Artist's commentary
Numachi Rouka and Araragi Tsukihi are
singing the opening theme to "Yama no Susume" together.
#MonogatariSeries
Someone well-versed in "Monogatari" would understand, right?
I'm not sure if I intended it myself when drawing it, but a beaming Numachi Rouka is cute, isn't she?
these two are voiced by the lead voice actresses in Yama no Susume