IW And-type dwarf novae, a subclass of Z Cam-type systems, exhibit brightness fluctuations during standstills that end with a terminal outburst followed by a decline into quiescence. These behaviors are challenging to explain within the framework of the standard thermal-viscous instability model for accretion disks. Two primary hypotheses have been proposed: variations in the mass-transfer rate from the companion star, and thermal-viscous instabilities in tilted accretion disks. However, the underlying mechanism remains unclear. In this study, we present multicolor imaging observations of IW And-type dwarf novae in the optical and near-infrared bands using the Kanata telescope at Hiroshima University. We focused on the IW And-type object KIC 9406652, capturing its brightness and color variations associated with all characteristic phenomena: oscillations at intermediate brightness, rebrightenings followed by deep dips, normal standstills, and normal outbursts. By analyzing the temporal evolution of the color index and magnitude, we detected a reddening trend when the object became brighter at the end of an oscillating standstill. This is the first time such behavior has been observed. The reddening suggests that the accretion disk radius gradually expands during this phase, providing new observational support for previous studies involving eclipses and negative superhumps.