[I'm moralist (Yanagihara Mitsuki, iapoc)] A Manga where a Lewd Crest has weakened my Master [ApricotJam]

A sculpted, monster-hunting master discovers her own disciple has branded her with a lewd crest, a curse that saps a warrior's strength and leaves her heavy breasts and hard-earned abs at the mercy of the boy who trained every day to surpass her. Proud taunts about his inadequacy melt into trembling, sweat-soaked moans as Yuuto proves exactly how manly he has become, driving his flustered master to gasp at how fierce her self-proclaimed pervert disciple has grown. By the final page she is stomping back through monster territory in a shameless new battle outfit, the crest still glowing above her hips, ordering him to warn her the next time the curse takes hold — and to show her more of that manly side.