This is tagged no_panties on Pixiv.

That Teetoku upskirt is certainly open to interpretation...

Teetoku's wondering if matsukaze's a guy.

Jarlath said:

This is tagged no_panties on Pixiv.

Well, just because you're wearing girl's underwear doesn't necessarily mean you're a girl.

Splendid in her denunciation, Teetoku is gracious in her understanding.

What exactly would be considered 'nice and small' in this particular situation?

sporked said:

What exactly would be considered 'nice and small' in this particular situation?

Kuritorisu!

Teetoku said:

She has no chest!

And is that a problem, Teetoku?

Doesn't it look like Matsu's last bubble refer to Teetoku as "Small One" instead?

Frawnkenstein said:

Doesn't it look like Matsu's last bubble refer to Teetoku as "Small One" instead?

What she's saying is "See! It's small!", though.... Yeah, what's small isn't explicitly mentioned, but it's not in a format where it seems like you could construe it as saying "See! You're small!"