.
But those guys ask: "the missed approach of WHICH procedure? Since you just flew a visual app, you can't know..."
When you are flying IFR you must follow those procedures. Visual approach is just a one approach method of IFR. It has nothing to do with VFR so why should you do a visual circuit? As a result of that in case of go-around you will follow published missed approach procedure or conditional missed approach clearance if given by ATC.
You can compare this situation to a circling approach as it is visual method of instrument approach as well. In case of go-around you will follow published procedure and definitely not make a new visual circuit like flying in VFR traffic pattern.
Best Regards,
Approaching Minimums