

水色時代
The story follows Yuko Kawai, a junior highschool student, as she faces the challenges of growing up and overcoming her shyness as she comes of age. She begins seeing her best friend Hiroshi Naganuma, the boy next door, in a different light. (from Wikipedia)
Aqua Age has 7 volumes.
Aqua Age is currently finished.
Aqua Age was written by Yuu Yabuuchi.
Aqua Age was published 1991 to 1994.

Kawai, Yuuko
Main

Naganumo, Hiroshi
Main
Hashimoto, Norihito
Supporting

Hirayama, Rumiko
Supporting
Igawa, Shouzaburou
Supporting

Inada, Mika
Supporting

Katakura, Ryouko
Supporting
Kawai, Yasuo
Supporting

Kawai, Atsuko
Supporting

Kawai, Toshiko
Supporting

Kitano, Miyuki
Supporting

Kugayama, Natsumi
Supporting
Miyauchi, Fuyuki
Supporting
Nakagawara, Chouko
Supporting
Senkawa, Mari
Supporting
Shibasaki, Haruhiko
Supporting

Takahata, Takako
Supporting
Tobita, Tomoko
Supporting
Ton-chan
Supporting

Tsutsumi, Kaori
Supporting
Ranked higher than 69% of all manga on AniTome (out of 30,039)
More popular than 13% of all manga
Yuu Yabuuchi also made