These originals are Restaurant to Another World.
Restaurant to Another World’s Hentai Manga
A Certain Summer Day
Aletta
Restaurant to Another World’s Character
Restaurant to Another World’s Link
wiki
Restaurant to Another World’s Japan infomation
Official site
Restaurant to Another World’s trivia
Restaurant to Another World is called “異世界食堂” in Japan.
“異世界” is Another World. “食堂” is Restaurant
