星を追う子ども アガルタの少年 [Hoshi wo ou kodomo: Agartha no Shōnen]
Book Series
by Asahi Hidaka
Latest:
2012
Book 2
Hoshi wo Ou Kodomo: Agartha no Shōnen (Volume 2)
by Asahi Hidaka, ひだかあさひ, Makoto Shinkai