COMPLEX's Hotei Tomoyasu would do something epic if not amazing with ayumi since he's legendary royalty in the industry with him being part of 1 of the most influential JRock bands ever aka BOØWY
If not , his counterpart Himuro Kyosuke is another great choice if ayumi wants to continue doing rock music in her future works
If all else , capsule's Nakata Yasutaka , please ! that guy is a genius in almost everything he does for other artistes >_<
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