Hitori de Yoru wa Koerarenai

The year 1950, Japan. Traumatized by the war, Seishiro is unable to sleep through the night. That is, until he meets Jim, a friendly American soldier stationed in Japan. Seeing the opportunity to change his life, Seishiro suggests they become a couple! Jim is smitten with Seishiro right away, seemingly oblivious to Sei's ulterior motives. At first, Seishiro only sees their relationship as a means to an end. But night after night, as he falls asleep in Jim’s gentle embrace, the heart that broke on the battlefield slowly begins to heal... (Source: TOKYOPOP) Note: Includes one extra chapter.