Dr. Stone ran 232 chapters, and Senku never gets a confirmed romantic partner. That fact actually supports my side: romance is not alien to Senku, it is simply expressed through trust and shared work rather than confessions. A lot of readers notice that Senku's closest bonds are with people who challenge his plans, follow through, and stay when things go wrong. That is the groundwork romance needs. The other side can call it unnecessary, but the story leaves the door open, and that makes a reasoned case FOR romance here, not a sentimental one.