*Note: Originally self-published, was then licensed and compiled by Ichijinsha for commercial release.*

When he woke up, he was in a room he didn't recognize. A little girl, Lulu, called him "Big Brother." "We're all here, I'll go get Dad!" Then Lulu left the room with a bright smile. He didn't know where he was. And he didn't have a sister. In an instant, the door opened. Something came with a rattling sound. Something called "Dad" entered the living room. A high concentration of mystery and fear is chained together in this crazy situational thriller. If you read this, you will be part of our "family" from today.

Longitude unknown Latitude unknown This island has no name. Everyone just calls it Island. Seven girls who have no memory of their past or even their name lives on this island. Both the town and island are deserted but water and food are supplied to them each month. The girls call each other by numbers and names associated with the number. Number 6, Mutsuka is a girl desperately trying to get back to her beloved sempai. She has tried 16 times but she won't give up until she succeed. In her attempts she'll learn about the other inhabitants and about the island and not all of it are pleasant.

While many girls her age want to join the band or chorus, Misaki Nonoka wants to lead students in music by being the conductor.

On Torishiro Island, a small island just off the mainland, lives Tsumugi Vanders—a slightly mysterious girl deeply absorbed in her journey of self-discovery. With her exotic appearance and adorable charm, one day she encounters Mr. Nagara, a walking stuffed animal with a floral pattern. To help Mr. Nagara find friends, Tsumugi begins traveling across the island, assisting in the search. But will they be able to find the companions they’re looking for? This is the beginning of Tsumugi’s unforgettable summer memories—stories never told in the main series! [Official- Comick Walker](https://comic-walker.com/detail/KC_006385_S/episodes/KC_0063850000200011_E?episodeType=first)