Hidaka Ikumi lost touch with his elder brother, Tomo, when Tomo was adopted into another family during their childhood. Now, at sixteen years old, Ikumi finds his life upended by Tomo’s sudden reappearance. To Ikumi's astonishment, his brother returns not as he once was, but dressed in women's clothing—or, at the very least, presenting as strikingly feminine. What circumstances could have driven Tomo to adopt this new persona, and what is the true purpose behind his unexpected homecoming?