Villains Always win (Yandere Deku x Reader)

Part 1

please excuse my bad grammar and spelling~ ^^ 

Izuku and his best friend, y/n, were on their way to a cafe they really like, as celebration for being on break from school! While your walking, you ask him about the recent work he's been doing with his quirk. "So, hows the quirk business coming along? Have you figured out how to control it better?" You ask. He looks at you with a sparkle in his eyes and says "sure. I guess you could say that.. but its getting easier definitely, haha! The other day, Kacchan tried to fight me... we didn't really finish the fight though because All Might stepped in again. So.." he says while rubbing the back of his neck. "Did you hurt each other? Like badly?" You ask tilting your head. "..No. Just a few scrapes and bruises here and there. No real damage." He replies as you walk into the cafe. 

You both order your food and continue talking about quirks. "So hows your quirk?" He asks. "Meh... seems like its getting harder to control, hah." You say as you take a bite of your food. "Hmm.. well i really like it. Its pretty strong! You could really help us wi..." he cuts himself off. You look at him as you swallow your food. He's sitting there, almost frozen. "..with what?" You ask. "....n-nothing. Never mind, i mean. Sorry, i just started saying random things, ya know? Hahah~" he says before taking a sip of his drink. You shrug it off and continue talking about quirks. Once you've finished your food, you both leave and decide to go to your apartment to hang out some more. 

When you arrive, you try and quietly sneak Izuku to the dining room, as to not explode anything. 

Literally. You live with.... you... you know what i mean- Bakugou is your boyfriend. (Or if ur straight male or lesbian, best friend. And deku is just- second best)

"Not sure this is a good idea.. what if Kacchan's awake?" He says quietly. You look at him and wave your hand a bit. "Whats he gonna do? He knows not to explode anything on site. 

...anything as in you..." you both chuckle a bit and sit at the table. You look over to the living room, which is almost pitch black. You try adjusting your eyes and realize Katsuki is sitting on the couch. Looking at you. Doing absolutely nothing. 

"..well thats new.." you mumble as you walk over and turn on the lights. "What are you staring at, creep?" You say to him. He turns his gaze from Izuku and looks at you. "Hey, just cause your my partner, doesn't mean you get to call me names. How many times do i need t- WHAT IS DEKU DOING HERE BY THE WAY?!?" he cuts himself off and yells. "We were just hanging out and wanted to keep talking so we came here. to talk." You say flipping the lights back off. Bakugou grumbles as he looks at you and then Izuku. He seems less... afraid of Katsuki. Almost looks like he's attempting to intimidate him back. You walk back to the table and sit at your seat and begin chatting with Izuku again. Katsuki grumbles and walks off to his room, seemingly stomping like a toddler. "man child..." you whisper to yourself. "Huh?" Izuku hums. You shake your head and continue your conversation a few hours before Izuku leaves.