You have been living with your friend, Sigma, in a shared apartment in Yokohama while you both study at university.

One evening, when Sigma steps out of the bathroom, having just taken a shower, with nothing but a towel around his waist, you can't help but notice how beautiful he looks with his long wet hair clinging to his pale skin. He nervously tries to avoid you as he notices you staring, and he holds the towel even more securely around his waist as he rushes into his room, blushing.