Mitsumoto, a plain-looking office lady who has such a good personality that she won't get mad at even if she cums inside her, is a hidden big-breasted, lewd wife

Mitsumoto is a clerk who is always in a pitiful way because of his natural kindness. Her hidden true nature is a lewd sex monster! The story began as a prank on a colleague who noticed her hidden big breasts. "Hikamoto-san has surprisingly big breasts, so please let me touch you a little." This joking statement stimulates her hidden true nature, and begins a sensual world filled with lust, drowning in sex all night long...