Sharing is Caring

Sunny Suzuki was a selfish person.

He was quite aware of that fact.

Ever since he was little, he was reluctant to share. His toys, his food, his crayons ... You name it.

He didn't want to share.

Even Mari.

Mari was his big sister, and Sunny loved her. He loved when she sang lullabies to him and hugged him and spent time with him all day.

Right.

She was his big sister, so no one else could have her.

Not even Hero.

Hero was nice, but it was painfully obvious that he had a massive crush on Mari. Sunny would have let him do his thing, if only he wasn't so obsessed with taking Mari away from him. Walking to school together? Why did he have to come too? Study dates? Mari did well on tests without help. Sunny was sure whatever advice Hero had to offer was useless anyway. And the day when he started tentatively reaching for Mari's hand was the day Sunny didn't like him anymore. It was funny to watch as he made a fool of himself in front of Mari most of the time, but now Mari was smiling at him too, and laughing and looking away from Sunny, and he just couldn't have that.
Mari was Sunny's big sister. Hero needed to understand that he would always be less important.
But he was stubborn.

He didn't give up when Sunny put spiders in his shoes and clothes, even though he cried like a baby. 

See, Mari? He's not worthy of you.

He didn't give up when Sunny instigated a fight between them two, they only "talked it out".

Even when Sunny put two whole Naga Viper Chilis inside his sandwich and he was sick for days, he was back next week. Stupid. Why didn't he get the hint? He wasn't welcome here.

Sunny should have put even more.

Mari got mad at him, that one time, but Sunny managed to convince her that he only meant to pull a prank, just like Kel did, and it just got out of hand. He had looked up at her with that face he knew she was a sucker for–the expression of barely concealed confusion and tentative question. Sunny had never been very good at conveying his emotions and thoughts on his face, which made Mari think he was 'different,' but also made her believe he didn't understand boundaries and social cues.

Sunny understood. He just didn't show it. That way he could use the misunderstanding to get out of...unpleasant, situations.

She forgave him, because of course she did, along with a stray comment about not imitating everything Kel did, her frown mildly disapproving. Sunny wasn't worried. He knew Mari would ultimately forget about this incident, and he would be back to being on the spot of beloved little brother.

And it happened just like that, with Hero's added forgiveness, quick and stupid.

Sunny still wasn't happy about that...thing they had going on, but he decided he would leave it be, at least for now–no matter the feeling of frustration that came up whenever the two would act lovey-dovey in front of him. Mari teased him because of his frown, but Sunny knew she didn't really know what would happen as much as he did.

See, Sunny decided to leave them be because he knew their relationship was bound to fail.

Teenage romances were shown as eternal in movies and video games, but Sunny knew that was all a lie. Mushy stuff didn't last in real life, and especially not in school. He'd seen one too many breakups and crying girls and sulking boys to believe that childish notion.

The only near romance he could tolerate was Captain Spaceboy and Sweetheart. She got jealous really easily, and threw tantrums whenever he tried to leave, with the Captain ultimately bending to her wishes, which he thought was pretty cute. To have someone who would care about you, and no one else but you...it was the ideal relationship, even though Sunny had no interest in such things.