Chiyomi is a high school girl who was born and raised in a Showa-era retro shopping district in Shonan. She is a kind-hearted girl who, despite having a slightly complicated family structure, spends her days cheerfully and is a member of the basketball club. Chiyomi has a cool older "brother" figure, Minami, who has been like a childhood friend to her, almost like a sibling since they were little. They have now officially become a couple. However, her beloved Minami suddenly appears before her, shrunk to a palm-sized 15 cm!

What kind of love story will Chiyomi and Minami weave as they face this unexpected turn of events?

The classic masterpiece "Minami's Lover," which has been adapted for Television numerous times, is now being revisualized with Minami who turns tiny!