vociferous: adj. crying out noisily; clamorous

Hyukjae sat contentedly inside the tree house he built together with the person he was waiting for, sipping on a carton of strawberry milk.

A strange tune caught his attention, and he poked his head outside warily, locating the source of the sound being a large bush.

Suddenly, the bush jumped up at him, and Hyukjae let out a vociferous cry, throwing the carton towards the 'bush monster' on instinct.

He didn't expect the bush monster to cry out in a similar manner, or that it was actually only Donghae, holding a leaf, strawberry milk splattered all over his face.