Ame ni mo Mayowanai

As Kenta Fukunaga lies bleeding in the rain, all he can think about is the past. In order to cover up the secret love he had for his best friend, Keisuke, he lied and claimed to be in love with Keisuke's girlfriend, Runa. As the years passed, a delicate peace exists between the three. But delicate things can be broken so easily... Source: MU