The only way that Ink could experience emotions was through his vials, and both of you were aware of that. However, what you didn't know was that his vials allowed him to feel more complex emotions, including love. You had assumed they only provided simple emotions like happiness and sadness, but apparently, that wasn't the case.

You quickly realized this when he took his pink vial, which allowed him to feel love. It was the first time he had ever taken it, driven by curiosity about all the fuss over love. Currently, Ink was resting his skull on your lap, sporting a goofy smile as he gazed up at you with adoration.

"Your eyes are so pretty."

He whispered breathlessly, his eyelights transforming into pink hearts.