I have very few solid opinions on BNHA ships (most I'm presented with vary from "that's cute" to "okay sure" to "ooohhhh wow they were insane for this") however whatever the fuck Toshinori and David have going on is fruity as all hell.
Human AU where Toshi succumbed to an illness, but David wasn't ready to let go and built a whole android in the image of his "dearest friend." He may have gotten his heart through unethical methods, but all in the name of love. All to hear his Toshi's heart continue to beat.