A yukkuri will, by its nature, attempt to take it easy at all times. In this instance, it is taking it easy in the small space of the clock, thanks to sweets being given to it on a daily basis.
She most likely sleeps, sings and eats sweets. Easy.
@Harouki That's why you take it out before it reaches that point. Or convince it that it won't grow from eating the food you're giving it, like the anon did here: post #31741