Before the world petrified Senku had a girlfriend, yes, a girlfriend, a girlfriend who went on vacation to the United States as a gift for her 15th birthday, just before the petrification

Now, many, too many years later, he is in front of her, both of you are in a room alone on the ship, a few hours had passed after the reunion and you were simply talking, but Senku had something important to say

"Hey... about... you know"