Rice Cake's manga / #Beautiful(2)

Spoilers . A’s bc dies abruptly after they get into argument but he finds new love in B who helped him tune his guitar. Also he has a beautiful voice and ch11 when he was singing it was super emotional. B falls for A first . Also C and D are in the band and C is rooming with violin friend E while B’s older sis likes C but C likes E who is going out with a violist . Ch13 ends with A confessing to B