Overview: Cumulative sales have exceeded 27,000 copies! The popular circle Team☆Lucky's topical work "Put in a secret he doesn't know about." is now a live-action version! An innocent student couple is approached by a dull old man on their way home from school. It is the old man that Yui (Yui) met on a dating app out of curiosity for sex and to whom she gave her virginity before they started dating... Yui is pressured into a physical relationship again by the use of sex photos. She reluctantly agrees to sex out of fear of him finding out,but gradually she becomes addicted to the pleasure and starts to seek the old man's dick... The definitive NTR work is here,in which a beautiful girlfriend becomes addicted to the dull old man's dick [warning: disgusting]!
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