(by extension from the "thorough" sense) so thoroughly knowledgeable and particular about something as to be annoying to others: picky, nitpicking, fussy / pushy, bossy, overly particular and demanding

noisy; loud

Ulsan (a city in South Korea)

studying, studies, study

to study / to discount, to reduce the price of something

Alternative form of 勉強

to be noisy / to create a disturbance / to disturb / lively; bustling

concentration

concentrate

noisy; loud; bustling