【TOB】Girls who can’t stand to defecate on bus excursions (big piss set)

Note)

This is a set of (large piss stage) and (small piss stage) of [Girls who can’t stand defecation on bus excursion].
It is not a new work.

This is the story of a bus that gets caught in a traffic jam, and the passengers and bus guide are held inside for a long time in a closed room with no toilet.
Will the girls be able to endure the looming urge to urinate and stool and reach their destination safely?