Buien is a fantastic Dutch word with a clever double meaning: it translates to both "rain showers" and "moods" or "tempers". This wordplay is the key to the entire song's metaphor.
In the lyrics, the singer complains about his partner's "buien" (moods) that stain his good mood like clouds. This emotional turmoil is then compared to a literal storm in the chorus: "Het regent harder dan ik hebben kan" (It's raining harder than I can take), making buien a powerful and poetic word to learn.
This song describes a relationship that's being drowned by one person's bad moods. The singer feels his partner's negativity is ruining his own happiness, singing, "Je buien maken vlekken / Op mijn hagelwit humeur" (Your moods make stains / On my snow-white mood). It's a great image, isn't it? He feels trapped. He's physically there with her, but he's already planning his escape: "Ik heb m'n handen op je heupen / Maar m'n hoofd is bij de deur" (I have my hands on your hips / But my head is at the door).
The whole song is built around a powerful metaphor of a storm. The Dutch word "buien" can mean both moods and rain showers, so when he sings "Het regent harder dan ik hebben kan" (It's raining harder than I can take), he means he's being overwhelmed by his partner's constant sadness. The relationship feels empty and lifeless, like a house where "niemand woont" (nobody lives). He's tried to get used to it, but he can't. The home doesn't feel safe anymore, and the rain is just too much to handle.