南くんの恋人 [Minami-kun no Koibito]

In Minami-kun no Koibito, a high school girl named Chiyo is magically shrunk to just a few inches tall, becoming the tiny secret companion of her classmate Minami-kun. This single-issue romantic comedy from Bungeishunjū, launched in 1998, explores the charmingly absurd dynamics of a relationship where one partner is small enough to fit in a pocket. Written and illustrated by Shungicu Uchida, the story is a cult classic for its blend of gentle humor and tender, unconventional romance.