The second movie in a trilogy.

The third and final movie in a trilogy.

Suzu Urano is a pure and kindhearted girl who loves to draw and keep her head in the clouds. Growing up in the outskirts of Hiroshima with her family, she is more than happy to help with her grandmother's nori business. However, when she becomes of age, Suzu leaves her beloved home to marry Shuusaku Houjou, a man she barely knows. As she integrates into her new husband's household, the homesick bride struggles to adjust to the unfamiliar environment as the war effort extends far beyond its point of no return. When the war reaches Suzu's own backyard and peace gives way to brutality, how will she support herself and those she comes to love along the way? Kono Sekai no Katasumi ni paints a colorful yet haunting depiction of everyday life in the years before and after World War II, showcasing the perseverance and fortitude of ordinary Japanese during one of the darkest periods of modern history. [Written by MAL Rewrite]

The Maison Ikkoku tennants throw a party to celebrate the marriage of Yuusaku and Kyouko. However, during the party Yuusaku hears that Kyouko is waiting for a letter. He becomes jealous and begins to doubt Kyouko, worrying that she still loves someone else. When the morning arrives, the answer to his worries is revealed...

(Source: AniDB)