My Oblivious Babysitter

18+

When Izuku was 12 she was asked if she would start babysitting her mother's best friend's son, Katsuki. At first, the young teen girl thought it would be a good idea to make a little extra money for college, what she didn't know was that Katsuki was anything but easy.

It was an early summer day just after school let out for summer break when Mitsuki had first called Izuku to ask if she could watch the little 6-year-old for the evening so they could have a date night. Izuku, of course, said yes and would be there at 6 pm sharp.

"Izuku, dear! Thank you so much for doing this for us!" Mitsuki gushed as Masaru walked into the room, a little blonde-haired boy behind him. It had been a couple of years since the greenette had seen the boy after Inko and she moved to be closer to her father, but after Hisashi died, Inko moved them back to their hometown, wanting to be closer to people she knew. Izuku was 9 when they moved away and 11 when her father unfortunately died.

"Of course, Auntie! It's no problem at all, I'm just happy I can help!" Izuku smiles back, her emerald eyes shifting back to the scowling 6-year-old. "Hello, Kacchan, I don't know if you remember me, but I'm Izuku. I used to hang out with you and Auntie Mitsuki when my mother was at work."

Katsuki glared at her, crossing his arms, his scarlet eyes clinically glancing over her in her gray sweatpants and loose tank top.

"I'm not a baby. I remember you just fine, Deku." The boy sassed, earning a smack from his mother.

"Behave Brat! Now, Izuku, we will be back at 8:30, call us if anything happens. I left a list of Katsuki's nighttime routine on the table. Have a good night you two!" Mitsuki says, giving a warning glare at her pouting son before Masaru pulls her out the door.

The Bakugou parents were using this night as a sort of test run. You see, Mitsuki was planning to go back to work now that Katsuki would be starting kindergarten that fall. So, they needed someone who could watch their little terror after school and during school breaks, and possibly on weekends. And they hoped Izuku would be that person.

That night Izuku discovered quite painfully that Katsuki was a handful and refused to listen to her. She had had a couple of summer jobs since she turned 10 and none of them were nearly as hard or frustrating as this one little boy was. Izuku swore by the end of those two and half hours, she was going to be bald or gray, if not both.

After the first week of her watching him, they came to an understanding, as long as he didn't break anything or break any of his parents' big rules, Izuku would leave him alone and let him do as he pleased. Of course, she kept a close eye on him but stayed to their peace treaty.

Years passed and Izuku continued to babysit the little nightmare who was now no longer a child, as he kept reminding her. Katsuki was now 11 years old and made it a point every time she was over to remind her, he was no longer a child.

It came to a head one winter day when the Bakugous were out of town on a business trip and expected to be back later in the evening, asking Izuku to go over to their house and watch Katsuki till they got home, and if she wanted, the greenette could spend the night and sleep in the spare room she used when she had to watch Katsuki late into the night or overnight.

School had just gotten out an hour ago when Izuku finally arrived at the Bakugou household, using her key to let herself in.

"Kacchan, are you here?!" Izuku called out as she slipped off her red sneakers, looking around the house for any sign of the young blonde.

"Bedroom, Deku!" He yelled back, sitting on his bed, watching the anime Fairy Tail.

She headed up the stairs and saw the first bedroom, in front of the stairway, the door was cracked. Slowly she pushed open the door, seeing the blonde sitting on his bed, arms crossed and a relaxed look on his face. With a soft smile, she crawled onto the bed beside him, leaning her head on his shoulder. Even though he's six years younger than her, he was the same height as her, allowing her to slouch slightly to the side to lay her head down.