デカくてエッチな俺の姉

NSFW

Developers: Marine

Languages: ja

Genres: ADVMultiple EndingsNameable ProtagonistHarem EndingSide PortraitsDate DisplayMore Than Seven EndingsNaked SpritesRead Text MarkingBleep CensorSprite ViewerCensored TextChangeable FontPregnancy Good Ending

Themes: Oneesan-type HeroineMale ProtagonistProtagonist's Childhood Friend as a HeroineProtagonist's Blood-related Sister as a HeroineBig Breast Sizes HeroineOnly Virgin HeroinesEar-CleaningLove HotelKissing SceneHeroine with Big BreastsProtagonist's Older Sister as a HeroineProtagonist's Full Sister as a Heroine

VNDB

The protagonist is called back home after being away for a long time. His memories of his brocon sisters being all over him makes him anxious to why he is being called back. Upon his arrival he is told his sisters caught special disease that makes them horny and the only cure is regular dosage of sperm. They specifically choose him to be the man to donate the sperm.