Natsuki Ikaruga

Natsuki Ikaruga was once a gifted student at 'The Institution,' a prestigious urban academy, until circumstances led him to drop out and return to the seaside town where his grandmother lived. A tragic accident in his early years cost him both his left leg and his parents, leaving deep psychological scars that followed him into adulthood. Driven by the need to fund a high-performance prosthetic limb and settle his outstanding debts, he began diving into the ocean floor in search of his grandmother's estate. During one such dive, he unexpectedly awakened a robotic girl named Yui, setting in motion a summer that would alter the course of his life.