SONE-734 "I'm Your Big Brother, But I Feel Good, So Do More." My Pure Little Sister Has Become Sexually Awakened And Always Smiles And Closes, And She's A Slut!Sakakibara Moe

Sakakibara Moe Subjective Sister
This is a story about me (you) suddenly finding the cutest little sister in the world, and being loved so much that she becomes a slut.
"Please come and see me from today! Big Brother!"
"Huh, what were you watching, Big Brother?? (laughs)"
"You were watching something sexy, right?"
"Well, then..."
"From today, Moe will be your big brother's masturbation material!"
"So, let's show you a lot of your big brother's face that's getting better?"
"You ejaculate so much with Moe?"
"Hey Big Brother... Let's have some sex now..."