Kirishima's sure he's the Prince Charming of this story. Bakugou is not exactly the princess he's been expecting. (spoilers through the 90s of the manga)

“Bakugou?” Bakugou shuffled on his feet, hovering over Kirishima and looking at the ground with stormy eyes. He glanced up to glare at Kirishima, a silent dare to call him out on his odd behavior no doubt. Kirishima forced himself not to tense. Whatever Bakugou wanted, he was about to show him and Kirishima had to get this right. Bakugou was all about showing and not telling. Kirishima nearly bit his tongue to keep in a squawk of surprise when Bakugou suddenly dropped to his knees next to him, shuffling forward until he could press his forehead to his thigh and hide his face against Kirishima's leg. Kirishima opened his mouth, questions on the tip of his tongue, and he barely managed to catch them before they could be given voice. Bakugou was trembling minutely, his entire frame so tense his muscles were twitching under Kirishima's gaze. “Just. Don't say anything,” Bakugou muttered, hands clenching in his lap tightly. “Please,” he whispered, a short choked sound.

Bakugou sleeping in the common areas like it’s no big deal seems to give everyone else permission to be just as bizarre, and little by little Kirishima starts learning things about his classmates he never knew.