Don't mind that picture.
3rd person's POV:
Bakugo shook his head, "No, I don't- don't do that shit-", Toga's hands slowly wrapped around Bakugo's neck, the blonde girl smirking. Deku's eyes widened.
"H-Himiko, please don't...~ Let me...- I-I mean, don't to that...", Deku was panting, looking over at Toga and Bakugo with lustful eyes. Toga smirked, giving Bakugo a look before walking over to the cart again, this time grabbing one of the water bottles. Toga then skips over to Deku, un-twisting the bottle cap and putting the bottle to Deku's mouth for him to drink. Deku looked over at Bakugo as he started to drink the now fizzy liquid. Toga untied Deku before stepping back, walking across the room and sitting in a chair by the door, locking the door, making sure no one would be walking in. "Mhm... hah... Kacchan~", Deku walks toward Katsuki, crawling on top of the blonde. Bakugo looks up into Deku's eyes as suddenly lips were slammed onto his. Deku quickly slipped his tongue into Bakugo's mouth, dragging his tongue across the roof of Katsuki's mouth. Deku slowly traced his hand to Bakugo's crotch, rubbing at the small bulge and making it bigger as he rubbed. Katsuki let out a soft moan as Deku squeezed his member. Deku pulled back for a moment.
"D-Deku-", Deku tore off Katsuki's t-shirt, then pulled down the blonde's sweatpants, looking at the other's erection through his underwear. Deku leaned forward, kissing Katsuki's chest as an idea struck his mind.
"Toga, do you have any toys...~?", the word "toys" scared Katsuki slightly. Well, didn't really scare him, or at least he wouldn't admit it did, but it surprised him. Toga nods, blush going across her cheeks and the tips of her ears.
"Y-yeah.. on the cart...", Toga nodded to the metal cart, "Bottom shelf.", she said as Izuku reached down, grabbing a box. Deku dumped out the box, revealing many dildos, ropes, cock rings (i didn't even wanna write "cock rings", is there another shiTTY word for it??), ball gags, butt-plugs, vibrators and lots of other things. Deku suddenly yanks the blonde's underwear down, shoving in a vibrator.
"Ah- dammit~! Deku, take it out... shit, that hurt...", Bakugo panted as Deku pressed it against the blonde boy's prostate, then turning it on. The blonde's eyes widened in shock and he started squirming. Deku pulled up Bakugo's underwear, then the boy's sweatpants, leaving him there half naked with a vibrator up his ass. Deku took off his bottom clothing as well, taking a vibrator and shoving it up his ass as well, no preparing what-so-ever.
"Jeez, Deku....~", Toga was moaning in the background. Deku was uncomfortable too, the vibrator just sitting in there in awkward position. The freckled kid took out the vibrator, beginning to scissoring himself with some lube.
-time skip passed deku preparing himself cause im lazy-
Deku panted as he shoved the vibrator up his ass, putting it on the highest degree as he moaned loudly. Toga tried keeping herself in her seat, biting her lip as Deku started pumping the vibrator in and out slowly.
"Nya~ Hah~! Kacchan!", Deku moaned breathlessly as he pumped the vibrator in and out, in and out, in and out. Katsuki watched, his eyes occasionally unfocusing due to the slight pleasure rubbing against his prostate.
"Nnn... Deku...~", Deku gets up, stumbling over to the cart and grabbing a syringe filled with green liquid and a knife, along with a pair of scissors. Deku looks at Bakugo with lust in his eyes, but the expression mislead him as Deku plunged the knife into Katsuki's upper arm, causing the blonde to shout in pain. "Deku! Ah- ow... shit . . .", Katsuki glares slightly at Deku, but the greenette quickly shoves the needle into Bakugo's neck, making the blonde yelp again. Deku yanks the knife out, quickly taking Bakugo's old shirt and wrapping it around the wound carefully to stop the bleeding as tears formed in Katsuki's eyes. Deku smirked, kissing Katsuki and wiping away the tear that fell suddenly. Deku takes Katsuki's pants and underwear back off, grabbing something behind himself. Katsuki's eyes widened as Deku grabbed his member tightly and began shoving beads into Katsuki's member (i did my research, thats a thing and its apparently painful, so).
"Kacchan...", Deku leaned forward as he still shoved in the beads, kissing Katsuki's neck slowly. Katsuki put his hands on Izuku's shoulders roughly.
"Damn, can I join~? I'm being serious at this point...", Toga said in the background, but she was ignored as Deku kissed Bakugo's collarbone.
TBC..
HAH
You better like that cause it took me an hour to write since I'm multi-tasking, but have that and enjoy. >:) Still taking recommendations on what you want to happen next, and my other story, Other Worlds, hasn't been updated in a while, so I made update that.

YOU ARE READING
I was wrong, but that doesn't make you right. (dekubaku)
FanfictionOk, so if I do end up writing smut in this, Deku will be top because I practically live for top Deku. "Deku... I was wrong... but that doesn't make you right." Bakugo looked up at Deku, small tears forming in the corners of his eyes. -p.s villain...