The boy waited for a billion years, unwavering till the end, for he knew she would return. War descended upon the planets near the red dwarf, shattering interstellar travel and silencing communication forever.
Before she left, Nana gave him a kiss and a promise to reunite. From that moment on, he was the last soul in the star system, silently guarding their vow through the boundless eternity of his immortal existence.