The cast
| Shizuku Tsukishima | . . . . . . . . | a freshman at Midorichou Mukaihara junior high school |
| Shio | . . . . . . . . | Shizuku's older sister |
| Tomoko | . . . . . . . . | Shizuku's mother |
| Yasunari | . . . . . . . . | Shizuku's father, a librarian at the prefectural public library |
| Yuuko | . . . . . . . . | Shizuku's classmate |
| Sugiyama | . . . . . . . . | Shizuku's classmate (referred to by last name only) |
| Kinu | . . . . . . . . | Shizuku's classmate |
| Seiji Amasawa | . . . . . . . . | a freshman at Midorichou Mukaihara junior high school |
| Kouji | . . . . . . . . | Seiji's older brother |
| Kousaka Sensei | . . . . . . . . | Shizuku's health sciences teacher |
The setting
| A middle-class Tokyo suburb, present day. |
