Gyarugewe no Sekai yo, Youkoso!ギャルゲヱの世界よ、ようこそ! ; 欢迎光临美少女游戏世界 ; Gal Game no Sekai yo, Youkoso! ; Galgame no Sekai yo, Youkoso! ; Galge no Sekai yo, Youkoso! ; Gyaruge no Sekai yo, Youkoso! ; Gyarugee no Sekai yo, Youkoso! ; Welcome to the World of Galgame!

Takenori is a major fan of Dating Sims. One day, he receives a strange eMail that tells him he can be the main character and asks him to insert the source material for his new world. Takenori inserts his favorite Dating Sim "Eternal Innocence" and after strange things he mistakens for a dream, wakes up - to find that all the heroines from Eternal Innocence have come to life in his usual surroundings!