We explore the connection between starspots and plages of three main-sequence stars by studying the chromospheric and photospheric activity over several rotation periods . We present simultaneous photometry and high-resolution ( R \sim 31 , 500 ) spectroscopy of KIC 9652680 , a young , superflare-producing G1 star with a rotation period of 1.4 days . Its Kepler light curve shows rotational modulation consistent with a bright hemisphere followed by a relatively dark hemisphere , generating photometric variability with a semi-amplitude of 4 % . We find that KIC 9652680 is darkest when its S -index of \ion Ca2 H & K emission is at its maximum . We interpret this anti-correlation between flux and S to indicate that dark starspots in the photosphere are co-located with the bright plages in the chromosphere , as they are on the Sun . Moving to lower masses and slower rotators , we present K2 observations with simultaneous spectroscopy of EPIC 211928486 ( K5V ) and EPIC 211966629 ( K4V ) , two active stars in the 650 Myr-old open cluster Praesepe . The K2 photometry reveals that both stars have rotation periods of 11.7 days ; while their flux varies by 1 and 2 % respectively , their \ion Ca2 H & K S -indices seem to hold relatively constant as a function of rotational phase . This suggests that extended chromospheric networks of plages are not concentrated into regions of emission centered on the starspots that drive rotational modulation , unlike KIC 9652680 . We also note that the \ion Ca2 emission of EPIC 211928486 dipped and recovered suddenly over the duration of one rotation , suggesting that the evolution timescale of plages may be of order the rotation period .