A Second Love Is Full of Tears

Tsukiko had two childhood friends, the twin brothers Yuuto and Kaito. One day after entering high school she started dating Yuuto. However, not long after that Yuuto dies in a car accident. Soon Kaito offers to take the place of his lost brother, and Tsukiko agrees. This is the sad and painful love story of two people who have both lost a loved one. Source: Renta!