One day, the young wife 'Hotaru' was entrusted with the care of her acquaintance's son, 'Shota'. Shota, who loves boobs, can't help but be fascinated by Hotaru's large breasts from the beginning. He quickly starts to show his perverted side, but Hotaru completely ignores his advances. Shota takes full advantage of this and plays all sorts of pranks! The actions escalate from squeezing breasts, titfucking, to creampie SEX!