deku being so obsessed with kacchan's cock that in the mornings while kacchan is brushing his teeth, deku comes up behind him & hugs him, snuggling into his back & mumbling abt his big & warm kacchan. & then deku's hands start wandering - they move up to play with his pecs

before trailing down the scratchy blond hair below his belly button to start groping & fondling kacchan's cock through his boxer briefs, muttering praises the whole time.

once he's hard, deku pulls the waistband down & peeks his head around kacchan's ribs & under his arm,

steadily beginning to jerk him off. kacchan watches deku in the mirror, whose cheeks are flushed & eyes completely focused on the cock in his hand.