Go with the Clouds, North-By-Northwest Vol. 5 (manga)

When Kei was down with a cold, physically and mentally tired from searching for his missing brother, it was his friend - Lilja - who took care of him. As thanks, Kei invites her on a road trip and he returns home mesmerized not just by the landscape of Iceland's volcanic craters, but also by Lilja's singing.

Meanwhile, his brother Mitchitaka appears unexpectedly on his doorstep after a long disappearance. Despite being suspected of three murders, Mitchitaka tells Kei that he is innocent. Will Kei choose to believe in his brother?