The next day
"Onee-chan!" Katsuki scream at the distance while waving his hand.
(Y/N) wave back to him while smiling, Katsuki giggled before running towards to the tree where (Y/N) sitting
"Don't run!" she said looking at Katsuki whose now nearly of her, she just sighed when Katsuki arrives
"You'll get tripped if you run too fast!" she said while messing Katsuki's hair
"Onee-chan, not my hair!" he resorted made her stop and laughed
The little spiky blond haired boy sit beside her "How's school?" (Y/N) asked looking at the boy
Katsuki look at her with a brightly smile in his lip "It's great! we all presented our quirk!"
The little boy said with a hint of excitement "I'm the most impressive quirk in my class!"
Katsuki said made (Y/N) nod before patting his head "Good to hear, Katsuki-kun"
The e/c eyes girl grabbed something beside her and gave it to Katsuki, It's a chocolate "What this for?"
"I brought chocolate, I already ate mine so eat it" (Y/N) said and look back to the book on her lap
"Thanks" the little spiky blond haired boy said before unwrapping the chocolate.
But (Y/N) noticed that Katsuki having a hard time unwrapping it so she grabbed it to him
And open it for him "Here" she said and look back to her, continued reading it.
"You're always reading, nee-san" Katsuki said grabbing the attention of e/c eyes girl and smile
"I got nothing to do so..." (Y/N) said before continuing reading the book on her hand.
"How about school?, are you not studying?" The red eyes boy asked before biting the chocolate
She stopped reading. 'I wish I could...' She thought before looking Bakugou "I wish I could..."
She said made Katsuki look at her confused "You wish?" he asked and bite another in his chocolate
"Why can't you?" Katsuki asked before finally look at (Y/N). She gave him a weak smile and pat his head
"Do you want to go to the kid cafe?" she changed the topic which made Katsuki look at her with an eyes sparkling
"Really?!" Katsuki asked with a hint of excitement, (Y/N) can't help just to chuckle and nod
Katsuki quickly finished his chocolate and get up "Oh" the little boy said
(Y/N) quickly look at her "What?" she asked before standing "I don't have money"
(Y/N) patted his head while smiling "No worries, I'll treat you" Katsuki eyes winded
(Y/N) pat his shoulder and look at the little boy eyes "I have a money" she said and wink
Katsuki just smirk at her before following her.
...
(Y/N) and Katsuki finally arrived at the Kids cafe and sit in the empty table
"Go play in there, I'll be ordering our food" (Y/N) said smiling made Katsuki nod and run to the play room
(Y/N) approach the counter and ordered an Ice cream and fries for the two of them.
The e/c eyes girl can't help to smile looking at Katsuki playing happily in the distance
She just sighed before putting down their order in the table and sit, she wave at Katsuki hoping to see her
Katsuki noticed (Y/N) waving so he quickly run to her "I ordered a food" (Y/N) said and pointed the ice cream
Katsuki eyes sparkled and sit "Woah" he said amused in the big ice cream (Y/N) ordered.
"Thank you for the food!" Katsuki said before he started digging it, (Y/N) smile and started eating the fries
"You know, i should've brought Kotaro here?" (Y/N) said and look around at the cafe
"Who is Kotaro?" Katsuki asked while eating the ice cream "Oh...how can I explain it?"
(Y/N) said and place a finger in her chin, thinking. "Next time I'll tell you" (Y/N) said before digging the ice cream
"Tch...you're really weird, onee-san" Katsuki said looking at her
(Y/N) just tilt her head while looking at her ice cream "What the?"
The e/c eyes girl said made Katsuki look at her confused "What is it?" The spiky haired boy asked
"My ice cream is not that big as yours!" (Y/N) said with a pout on her lips
"Look!"
(Y/N) said before comparing her ice cream to Katsuki, while the little boy just gave her a disappointing look
'She's childish' Katsuki thought before sighing "nee-san, because you ordered for an adult not an a child size"
The red eyes boy explains and look at the counter behind her "Look, the kid size is big and the adult size is small"
(Y/N) look behind her and saw the sign in the counter of Katsuki explaining for. She pout and look back at Katsuki
"They should've asked me if I want an adult size or kid size" (Y/N) said and started eating her ice cream
"Idiot, you should've read the menu!" Katsuki said before continuing eating.
"But the adult was supposed to be an Big size" (Y/N) said and grabbed fries "Tch, I can't believe this"
"How old are you, onee-san?" Katsuki asked made (Y/N) eyes winded.
"I suppose that your already in your 15? or 16?, but you're still acting like an 6 year old"
Katsuki said and dig a spoon of his ice cream, (Y/N) lips turned into a smirk looking at the boy talking.
She scratch the back of her neck "You're right, i should've read the menu" (Y/N) said and started eating her ice cream
'I think I'm talking to an 15 year old boy' she thought smiling at Katsuki.
Katsuki just click his tongue before eating a fries.
(Y/N) look at her wristwatch "Oh!" (Y/N) said raising her eyesbrow, grabbing the attention of the little boy
"We should hurry, it's almost 5PM!" (Y/N) said and look at the spiky blond haired little boy eating
Katsuki nod.