  Rare $B$-decays induced by flavour-changing neutral currents (FCNC) is one of
the promising candidates for probing physics beyond the Standard model.
However, for identifying potential new physics from the data, reliable control
over QCD contributions is necessary. We focus on one of such QCD contributions
- the charming loops - that potentially can lead to difficulties in
disentangling new physics effects from the observables and discuss the
possibility to gain control over theoretical predictions for charming loops.
