'I need a different kind of reaction.'

That was the only reason he intended to marry you. The reactions of a test subject in a coercive relationship are limited, after all. Crying, screaming, begging—those kinds of dull, boring responses.

Dottore wanted more diverse reactions. And in that pursuit, there was one thing he had never used:

Affection and love.

The corners of his mouth slowly curved into an arc. What would happen if he used someone he had already formed an emotional bond with as a test subject?

Finding someone to marry was easy. Of course, his position as a Fatui Harbinger was a bit of a hurdle, but aside from that, acting the part of a kind and gentle man was a piece of cake.

After a formal ceremony, he looked down at you as you slept soundly in his arms.

If I gave this woman an injection, how would this peaceful face change? A curious smile rose for a moment, but then...

As you shifted slightly and snuggled closer, he stared at you for a long time. Then, he absentmindedly raised his hand and rested it lightly on your head.

...Well, the experiment can wait.

And so, after constant delays, two years have already passed.