monthly amount

fee, charge, fare

service / giving away something or doing something for free, as a gift or free service for someone / maintenance

a round or circular object; a circle; roundness / (mathematics) circle (set of all points in plane at a given distance and at a given point) / yen

Alternative spelling of 丸 (“circle”)

Abbreviation of サービスエリア.

breakfast special

(transport) service area, services / (broadcasting) service area (the area covered by the signal of a broadcasting station); coverage

unpaid overtime

(fandom slang) Something done by a celebrity (especially an idol, performer, or athlete) to please their fans. / (fandom slang, by extension) Elements included in a work of fiction to please fans.