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We present a photometric, spectroscopic, asteroseismic, and evolutionaryanalysis of the Algol-type eclipsing binary KIC 12268220. We find the O'Connelleffect and anticorrelated eclipse timing variations in the Kepler light curve,revealing the presence of large starspots. Radial velocities and atmosphericparameters are obtained from ground-based spectroscopic observations. Combinedwith the radial velocity measurements and Gaia-derived total luminosity, ourlight-curve modeling yields the solution of the physical parameters for boththe primary and secondary components. We find 14 independent frequenciesarising from the $\delta$ Scuti primary, and the observed frequencies agreewith the frequency range of unstable modes from nonadiabatic calculations.Based on the conclusion from previous literature, we run a grid of models tostudy the evolution process of our system. The evolutionary tracks of our modelsuggest that the low-mass ($\sim 0.23\,M_\odot$) evolved secondary shows asimilar evolutionary state to the R CMa-type system, which might evolve to anEL CVn system.

KIC 12268220: A $\delta$ Scuti Pulsating Star and an Active Protohelium White Dwarf in an Eclipsing Binary System