How does Pink Bean work?

My friend won't shut up about how 3 minutes isn't enough time to Pink Bean or something about Pink Bean and 3 minutes.
How does the timer and stage system work?

You kill this guy:

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Then you kill these guys:

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Then you kill these guys:

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Then you kill these guys:

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Then you kill these guys:

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Then you kill him:

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1 hour. Go.

You kill this guy:

 Spoiler

Then you kill these guys:

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Then you kill these guys:

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Then you kill these guys:

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Then you kill these guys:

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Then you kill him:

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1 hour. Go.

You attack this guy:

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After 3 minutes, you get banned.

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For a month.

He's probably referring to the recent bannings of Windia's pb group. They went in and attacked for 3min and then were all banned with the exception of two bishops

Don't Pink Bean until Nexon does something about it.

You attack this guy:

 Spoiler

After 3 minutes, you get banned.

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For a month.

i was about to do this, damn you and your ninja skills

He asked how the timer and stage system works