春綴る、桜咲くこの部屋で [Haru Tsuzuru, Sakura Saku Kono Heya de]

春綴る、桜咲くこの部屋で [Haru Tsuzuru, Sakura Saku Kono Heya de] is a 0-book series with contributions by Tokuwotsumu and Christina Rinnerthaler.