C279 All Four Houses(1)

Achievement Unlocked: Four Rooms Under One Roof

Spending time at home with four peers of the opposite sex 1/7

What in the world? What kind of achievement is "Four Rooms Under One Roof"? Shouldn't it be "Four Generations Under One Roof"? Is it supposed to trigger when I bring my child to visit the grandparents? What's with this "Four Rooms" thing?

Hsiang Tai was utterly perplexed