  We present the ${\it Kepler}$ photometry of KIC 6048106 exhibiting O'Connell
effect and multiperiodic pulsations. Including a starspot on either of the
components, light-curve synthesis indicates that this system is a semi-detached
Algol with a mass ratio of 0.211, an orbital inclination of 73.9 deg, and a
large temperature difference of 2,534 K. To examine in detail both spot
variations and pulsations, we separately analyzed the {\it Kepler} time-series
data at the interval of an orbital period by an iterative way. The results
reveal that the variable asymmetries of the light maxima can be interpreted as
the changes of a magnetic cool spot on the secondary component with time.
Multiple frequency analyses were performed in the outside-eclipse light
residuals after removal of the binarity effects from the observed {\it Kepler}
data. We detected 30 frequencies with signal to noise amplitude ratios larger
than 4.0, of which six ($f_2$--$f_6$ and $f_{10}$) can be identified as
high-order (17 $\le n \le$ 25) low-degree ($\ell$ = 2) gravity-mode pulsations
that were stable during the observing run of 200 d. In contrast, the other
frequencies may be harmonic and combination terms. For the six frequencies, the
pulsation periods and pulsation constants are in the ranges of 0.352$-$0.506 d
and 0.232$-$0.333 d, respectively. These values and the position on the HR
diagram demonstrate that the primary star is a $\gamma$ Dor variable. The
evolutionary status and the pulsation nature of KIC 6048106 are discussed.
