@luvicvis he maybe means that, as it may have a greater amount of caffeine by not filtering, they want to keep awake all night and have some responsible handholding.
@rhino36 Doraemon on page 3?
Manabu is near death because of his luck. The amount of bad luck must be on par with the good luck he'll have when they get to be a couple. It's the first law of equivalent exchange.