Sono Te Ni Muse Ga Yorisou summary:

Working as a piano tuner, Yuzuru had met various kinds of pianist. But when the music of a unique and eccentric pianist Rion reaches his ears, he knows that he won't be able to escape from the latter's charms. And when Rion confesses his love and convey his desire to make Yuzuru as his official piano tuner, Yuzuru find it as something that is hard to believe. Does Rion like him for who he is or his skills?