Trinoline Genesis

One hot, midsummer's day, Shun Nanami's sister, Shirone Nanami, drowned at sea. - It's a memory he will never forget; one that will forever be etched into his heart. - He vows to live in her stead from then on and to make up for the life she never got to have. - Time passes and Shun currently spends his days attending school like any other student. - Yet another sultry summer bears down upon him, reminding him of the sibling he had lost all those years ago... - However, that summer was different. Shun hears a piano's melody far off in the distance - a tune Shirone always adored. He follows the sound to its source, only to find... his sister, Shirone. - "Please take care of me from now on, Onii-chan." - The being that stood before him was not of his own flesh and blood, but an android who looked exactly like her. Her name was... - "TRINO."​