Adult PC Game: Santa-chan is not pregnant!! v1.0 by yoshii tech Archive

In the town where "Noel=Santa Claus," also known as Bikini Santa, resides, monsters have arrived to disrupt Christmas! Use the power of Christmas to defeat the monsters!!
However, Bikini Santa's superpower is lost when her bikini is removed.
Deprived of her power, Bikini Santa is repeatedly gang-raped by the sexually hungry monsters, becoming drenched in fluids and rapidly impregnated overnight, with her belly swelling bigger and bigger. Yet, the monsters continue to gang-rape her...​

Santa-chan is not pregnant!! v1.0 by yoshii tech Gameplay Preview