One day, Ringo discovers that he has transmigrated. In this unfamiliar world, he unexpectedly finds that all sorts of strange things have suddenly appeared around him.
For example, the super-capable and gentle older sister Hoshino Shizuru, the System-kun with the mouth of an online troll, and Kokkoro, who is like a mother to him...
Just as Ringo thinks he has arrived in a game world, Aqua, Amiya, Tadokoro Koji, Raiden Mei, and a whole host of two-dimensional waifus suddenly appear. Only then does he realize that his transmigration is no simple matter.
P.S. 1: I'm terrible at titles and descriptions, so try reading the first few chapters to see if it's to your taste.
P.S. 2: I'm a newbie. Please give this humble author a chance!