First off , i need to say that english isn't my first language so i'm sorry for mistakes
And second , here enjoy a concept plot to the game where girl is meaby oblivious to the MC/PC NTRing her
MC - Main Character PC - Player Character
When MC/PC was young he was one and only boy in the village , he had many friends in the village as he grows up he needed to (travel into a city / go on an adventure) to learn how to become a (warrior/mage/knight/etc...) . He come back to the village that he left to show everyone how hes grown , people in the village give him a job as the willage guard/adventurer and are giving him some quest , but he did not come alone to the village , when he was gone he got a girlfriend that traveled with him back to the village and starts to live and work with him . As time goes by meaby she starts to notice that something "weird" is happening around her boyfriend/MC/PC , and as the time goes by MC/PC is being seduced by people in the village
(yes i'm implying cute girls/futas/traps/femboys/moms/aunts/grannies (Example : Astolfo - Yes Lumberjack - No)) , girlfriend is not attending/ignoring MC/PC needs or can't fully satisfy him , and villagers are more than happy and willing to "lend a helping hand or more" to satisfy MC/PC needs .
So MC will fuck around but can he hide it (he will be NTRing his girlfriend) ? or somehow prevent sexuall encounters ? and he's girlfriend , will she be living oblivious ? or find out and leave him ? or get a thrill from it and start sharing him ? or completely fall in love in being cooked (breaking stereotype that only guys can be cooked)