You can't cum until I say so.

"You can't cum until I say so."
After overtime, alone in the office with just the two of you. A sweet-sadistic older senpai edges you and counts you down through 60 minutes of ejaculation control. Two releases: a countdown cum, and a creampie while she rides you.
Friday night, 11:30 PM. Overtime is finally over, and only you and your senpai are left on the floor. The coworker who's so kind and dependable at work sits down right beside you and starts teasing you, low in your ear: "Tonight, I'm the one in control. You can't cum until I say so."
Made to grip it slowly, counted down, then stopped. Sixty minutes of edging in that mischievous-yet-sweet voice. Keep to her rules, and a very special reward is waiting at the end. Female-led, no role reversal -- she never once gives up control.
(Japanese voice, full English subtitles -- not dubbed.)