Hello! I'm looking for a specific manga that unfortunately I don't remember much detail about.

At one point the setting was in a (boys'?) dormitory where each room has to earn points (or a similar reward system) in order to get food or other items.
The two characters don't get along very well and so don't earn points/rewards often, but they finally manage to earn enough to get an egg, and happily decided to cook the egg... using a microwave.
Which went as well as could be expected XD

Hopefully this rings a bell for someone. Thank you in advance!