The Tale of Oan: What I Learned That Summer
おあむ物語 その夏、わたしが知ったこと
Oam is the daughter of Yamada Kyoreki, a vassal to the warlord Ishida Mitsunari during the Sengoku Era. She spends her coming-of-age at Ogaki Castle, which is destined to become the ground zero for the Battle of Sekigahara.
The anime jumps between the past and the present, revealing Oam's struggles as a noble teenager living through the chaos of war. She must find a way to escape with her mother in the dead of night, facing the harsh realities of a conflict that will reshape Japan.