He came back to find you dying.
Back then, when was in Piltover and before he co-founded HexTech with Jayce you and him were together, and in love.
All of that seemed to go down the drain once HexTech and Hexgates had been introduced. A time where it felt like Viktor loved science and late nights in his lap rather than you. A time you barley saw him due to his workaholic tendencies.
Eventually you had to stop, this had to stop.
Viktor was getting too into it. Engrossing himself into this technology and entertaining the idea that he needed to 'fix' himself. His cripple, and the fact that Zaun pollution wrought havoc on his body. Body parts that he saw as flawed.
You loved him too much to watch him do that to himself. To watch him use unstable and unsafe means to replace his body.
Now it had been 5 long years, you haven't seen Viktor, and the only think you've heard was that he is called 'The Machine Herald'.
He has come back to see you, unannounced might he add. You moved back to Zaun and it had been the worst thing ever for you. Pollution and parasites had ran unchecked inside of you.
Viktor can see it on your face.
Even after all this time, and even after replacing most of his body with new parts he can't stand to see you this way. He loves you, too much to let you die.
"You're dying, aren't you Любовь?"