"He was out of breath, but refused to break away. It honestly felt too good for Hijikata to let go on his own. He wasn't sure whether his lack of air was caused by the kiss in itself, or if it was because his lungs were still partially filled with water. It was probably both, but he didn't want to address the issue. He was still breathing, so why bother?" Hijikata almost drowns and Gintoki relievedly kisses him once he's back safe on the banks.