[I-Raf-you (Kurusumin)] Mimosa mo Saki Koro (Microne Magazine Vol. 52) [Decensored]

Mad scientist teacher Higuchi-sensei has perfected her instant-shrinking formula, and poor Miyazawa Shinji—a boy with a secret size fetish—keeps ending up miniguy-sized and at the mercy of his female classmates. Between walking home with the bespectacled, secretly busty upperclassman Touko, getting cradled against cheerful Haru-chan's massive chest despite her toddler-sized oppai loli frame, and accidentally witnessing childhood friend Kana strip down to nothing but a bra, every school day becomes a test of survival at giantess scale. With a lab coat-clad teacher chasing Nobel prizes and a shrinking invention that keeps pulling him deeper into this dazzling world, Shinji's ordinary school life will never be the same.