You can Shoto had been in a relationship for quite a while. Even if his father didn't approve of him having a Boyfriend/Girlfriend/Whatever you want really. Shoto didn't care about what his father thought of him. And it made him quite happy to piss off his father, which is the only other time you see him smile without you. Shoto: "I'm not leaving her/him/them, Endeavor." Endeavor: "YOU NEED TO FOCUS ON UA! SHOTO!"