Izuku Midoriya:

You both went to your favorite place to hang out when you saw your ex again. The motivation behind your breakup is because he would constantly urge you to use your quirk to discharge tranquilizer bullets on different girls. You did not think significant of it at first until you saw him doing stuff with those ladies, cheating on you. He claimed you were absurd.

You stiffened in terror at the eyesight of your ex as he sauntered over to you. Izuku was not around at the time since he was purchasing your meals.  

"Well, look who came crawling back to me," your ex said. You rocked your head no and said that you didn't crawl back to him, prompting him of what he had caused when you two did date. He insisted repeatedly that you were absurd and said that you were creeping back to him because you couldn't obtain anyone surpassing him.

 You were about to dismiss it when you felt a pair of arms encircling around your waist and a chin leaning on your shoulder. "She is taken, by me, so back off," Izuku told him. He chuckled at the two of you and told you to confirm it.

 Remembering that Deku was not one to make the initial move, you turn your head and kiss him. He reddens and kisses back, converting it to a makeout session. Your ex then left with a temper. You and Deku then pulled apart, both of your faces turning vivid red.

Shoto Todoroki:

You and your ex were in an abusive relationship and you left him. He insisted you weren't putting sufficient effort into your relationship, yet you were the one who had put all of the efforts in, but when you said that, he would call you a fabricator and beat you. Shoto knew about your ex just in case if he ever came around.

You and Shoto were enjoying some time at the park when you heard footsteps coming towards you. Both of you decide to ignore it until you were jostled onto the floor. Leaning your head up, you see your ex glaring at you. 

"So this is the guy you left me for?" he asked with a gnarl. Todoroki came to your defense responding  with a "Yes, I am, so what?" Your ex decided to warn you to Shoto saying that you were just using him and that you weren't putting anything into your relationship.

 "Are you sure about that? Y/N does not use me because of who I am, she really loves me and we both are putting an equivalent amount of effort into our relationship, now I suggest you scram before things get messy," Todoroki said in a stringent voice. Your ex began to chuckle and was sarcastic, pretending to be intimidated while hitting you in the gut. That was Shoto's breaking point. He then set your ex on fire and had him glide on ice. He then got really startled by Shoto and sped off.

Todoroki then spun around to make certain you were alright. You smiled and nodded. Sighing, Shoto gave you a kiss.

Bakugo Katsuki:

Now your ex before you got with Bakugo was friendly and all, but the point was you hardly knew the boy, and the same was with him since you were arranged up on a blind date. Both of you did not have reciprocated feelings for one another and decided it was best to break up. 

You and Bakugo were at your preferred cafe when you saw your ex again. He walks over once he saw you and decides to converse with you. You two were having a delightful conversation until he started leaning in for a kiss. You tried to find a way of freedom, but he has you captured in a trap. 

Shaking, you directed your head apart from him so he couldn't kiss you. You then hear Bakugo screaming and slapping the guy in the face. He started yelling at him, slight explosions proceeding from his palms. Your ex was exaggerating by declaring that you executed the initial move on him. Doubting it, Bakugo stated that he witnessed the entire thing, and how he ensnared you and made the first move. 

Your ex marched away in irritation. Trembling, you hold Bakugo appreciating him for protecting you. "What sort of hero or companion would I be if I didn't protect you?" he asked smirking before caressing your cheek giving you a kiss.

Denki Kaminari

Nothing else to say but your ex was toxic as any person could be. He was a controlling, manipulative, corrupt, judgemental,  perverted, gold-digging, two-timing jerk.

 Okay, Denki was a pervert, but at least it was not as inadequate as your ex-boyfriend. 

You two were going to see a brand-new movie that just came out in theaters. Denki wanted you to wait for him while he bought your snacks. You were standing there when you felt someone's hand on your butt. You giggled and assumed it was just Mineta being uncanny as normal or a little child attempting to get your attention. Turning around, you notice your ex, smirking. You were then stiffened in horror as he started calling you unpleasant names and began pulling you elsewhere.

 You then choose to use your quirk on him, provoking him to let you withdraw. You then rush to Denki, who was there and gave you your snacks. You thank him and sneak behind him. At first, Denki was puzzled until he noticed the man who was at least 10 inches bigger than him. Denki then zapped him and said to back off and leave you alone, that you were more content without him. 

Denki called for security, both of you explaining what occurred. The security officers then lead your ex out of the cinema, banning him even. Denki whispers that you need to get a restraining order against him. Nodding, you both stroll to watch the film.

Ejiro Kirishima

Being related to Ms. Joke, you were kinda careful with the guys you chose to date. Younger or not, Ms. Joke was protective of you. So when she heard your ex had used you to get with someone else, oh boy was she enraged. She told him some harsh jokes and warned him not to come near you ever again, to which he agreed.

At least, you believed he agreed.

On one of your dates with Ejiro, you detect your ex with his brand-new girlfriend, it was the same girl that he had cheated on you with. He catches you as well beside Kirishima. Smirking evilly, he wanders over to you. "Well look who it is, Y/N Fukukado, here with someone else who will take advantage of you? You don't deserve love, nobody would love a misfit like you, particularly someone who is related to Emi Fukukado," he said with a confident voice.

 Kirishima was in shock and saw you at the brink of tears. "Oh, what's the matter, gonna cry, big baby," your ex said before receiving a blow to the face by Kirishima, who told him off. He told him that you were the best thing to have happened to him, that you were the most beautiful woman in the entire world. 

Note when Kirishima punched him, he did apply his quirk, producing a few broken teeth and a bleeding nose. 

His new sweetheart looked at your broken-hearted state and cut it off with him, apologizing for his behavior. Smiling, you forgave the girl.

After that entire catastrophe, you and Kirishima continued on with your date. 

Tenya Iida

You were training with Iida when you saw your ex. The reason you broke up with him was that he was a bit obsessed with you. After your break up, people would inform you how he would follow you, keep your garments and bits of your hair, even tracking you on social media, screenshotting photos of you. 

You were creeped out by this behavior. So when you saw him while you were training, with a camera, you weren't doing your best. Iida noticed this and stopped training to ask you why. You point out where your ex was, telling him everything about what he does. 

Iida then rushed over to your ex and scolded him. Your ex ignored him and began to start following you. You decide to use your quirk on him and blinded him temporarily. You and Iida ran to Nezu and told him the situation. 

Later you both learned that he was banned from the school and that he would be moving to a different country. You and Iida were thrilled and relaxed.

Hanta Sero

One word to describe your ex, murderous. You legit thought that he was a yandere, which he was. You broke up with him when you caught him trying to shoot your brother cause he thought you were cheating on him with him. 

You were hanging out with Sero at the park when you detected a gunshot from behind you. Luckily for your excellent reflexes, you intercepted the missile that was directed at Sero. Sero was astounded at your lightning speed and swung around to see where that missile came from. 

"Hello my love," your ex said, walking up to you kissing your cheek. You were so uncomfortable with his movements. 

You can see Seros's eye twitching out of the corner of yours, viewing you uncomfortable and someone else describing you as their love aggravated him.

You tell your ex that you two were not a couple and that you were no longer his 'love.' He got enraged and said you both were meant to be together. Shuddering, you dismissed it again, saying that you two were separated and forever will be.

Enraged, your ex clutched a blade and planted it into your neck. Sero's first response was to tape him to the tree and dial 911. Sero then walked you both away and bought you both ice cream, calming you down.

You acknowledged Sero with a kiss, instantly transforming into a make-out session.

Hitoshi Shinso:

Shinso and you were at the aquarium when you located your orally offensive ex. He would fundamentally laugh at you and your interests and chuckle about your quirk. You stopped it by saying that if he didn't appreciate you for who you are, you two shouldn't be together. 

You and Shinso were staring at the tropical fish when you noticed your ex with a group of boys. He started calling you names. You shuddered and pulled your hood over your head, hiding from him. 

Shinso, being the person he was, asked your ex and his friends a question. When they responded, they have then swung around and walked away, without control of their bodies.  Once they were out of your sight, Shinso pulled down your hood and gave you a kiss. 

This man would do anything to make sure you were always happy. 

Mashirao Ojiro:

You and Ojiro were hanging out at the water park when you saw your ex, who was working there now. He never actually paid any attention to you when you both were dating. He made it obvious to his buddies that he was just dating you for reputation, since you were adopted by Mirko.

You both were going to go down one of the slides that needed a two people tube. You were provided one by the employees. When you started to thank them, you recognize that it was your ex. You stiffened in terror and your wolf ears stood up. He began to stroke your ears and call you his puppy. 

Mashirao noticed your uncomfort and walked over, smacking your ex with his tail. You giggled at the gesture. He told your ex to back off and that you were no longer his puppy.  Growling your ex was about to say that he was using you for his reputation, when Mashirao smacked him again. Both of you went down the slide together with a smile and a giggle. You loved Ojiro so much.