さほこクエスト～陰キャ女子、紳士向け同人RPG世界で勇者になる～

Due to overwhelming popularity, it's now a full serialization! A shy, self-doubting girl is transported to a world that looks strangely familiar... and way too erotic!? In a world ruled by sex battles, her goal is to clear it while staying a virgin! From Toshinori Takayama, the creator of i・Shoujo, comes a new isekai pleasure fantasy!