Mom's rules are absolute... Mom is always right... I have no secrets from Mom... That's what the boy believed—until a teacher came for a home visit and bluntly told him his grades were too low to get into his desired school. That's when an outstanding private tutor, who earned a Ph.D. in the U.S., was introduced. Mom eagerly welcomed her, but the woman who arrived was a flashy, revealing gal impossible to ignore. The teacher comments, "Isn't your outfit a bit too bold?" Mom judges her instantly by appearance—this tutor might be fired immediately. Sitting beside her, the boy tenses up as her breasts draw near, making his heart race. The teacher says, "Since Mom is always right, please wear something more modest next time." Then she teases, "Ah, a mama's boy? Loving your mom means you're kind-hearted! So... were you checking out my boobs?" The boy stammers, "N-No, I wasn't!" But the teacher notices, "Hmm, this tissue... and this smell!" She realizes the truth and whispers, "You're interested in girls, aren't you? You don't have to tell Mom everything." Tempted by her words, the boy feels guilt for the first time—and loses his virginity to the tutor. He erupts inside her in a creampie. Desperate for her reward, he throws himself into studying. As his grades improve, Mom's attitude toward the teacher completely changes. But just when Mom lets her guard down, a sudden voice whispers, "Your mom's so easy to read. Let's do something naughty here behind her back." Within earshot of Mom's voice, within sight of her, smelling the food she's cooking—this is going too far, right? I... I can't...? Wait, I'm fully erect. Mom, help— I've become completely obsessed with Mayuki-sensei...