I think the issue is how the osa-yuku is too many heads tall. I wasn't sure how to translate 頭身, it's either 'head and body' or 'heads tall' or 'the ratio between body and head'. Kaguya probably thinks Doremy is complaining about her body though...
This may be a dream
but could you use a bit more discretion...What?Discretion?It just...Head and body...Girl is vacationing...