胸がこわれそう

Nao and You are cousins. You began to live with Nao's family after he was abandoned by his own mother. Ever since then, he has always been together with Nao and Nao's childhood friend, Haruki. Haruki enjoys spoiling Nao and even though You is stern with his words, he is always gentle to Nao, too. As time goes by, Nao finds himself attracted to You, and both You and Haruki find themselves falling more and more in love with Nao. But one day, out of the blue, their love became something that cannot be conveyed…