I like em chunky

 Hizashi's small eyebrows drew his expressive forehead into a worried point. "What the hell's happening to me?!" 

His lower belly was swollen, hanging over his belt like he'd suddenly gained thirty pounds or more overnight. He winced and poked at it with a finger. The skin sunk in where he jabbed, a soft, malleable substance.

Fat.

"Hey, Hizashi - you okay?" 

He jerked around at the sound of the voice and then froze, his ears and neck flaring in shame. Of course the first person to see him like this was the school's counselor, a close friend and his <i>fucking crush</i>.

"Ack!"

"Ohmigod, Zashi!" Her cat's ears popped straight up in shock. "That's not natural!"

"Ya think?! I must've got hit with some weird quirk."

She fussed over him, running a hand gently over the bulge and causing him to simultaneously lock up and shiver in different areas. "You have to get checked out. I don't know how that could be medical, but if it is, it's serious!"

"Yeah. Yeah, m'going right now."

The clinic ran tests and confirmed that it was not natural weight gain. He was sent home with a () diagnosis and no treatment. Elly was waiting anxiously for him and followed him to his room when he got back.

"Zashi..?"

"They don't know whose quirk did this," he mourned in an oddly quiet voice. "I don't - they don't know if I can go back to normal, either."

"Does it hurt?" 

"Nah. I look... well, different, is all." He looked away, blushing.

"You don't look <i>that</i> different." Elly sat beside him on the bed and rested a hand on his shoulder. "You're still handsome, for one." He snorted and she shook her head, violently dismissing his unspoken protest. "No, honest! I still think you're hot. Um. I mean, I know we're just friends but - but..." She trailed off awkwardly. "Oh, dear."

He turned to stare at her incredulously, his one eyelid drooping in that way he had. "You think I'm <i>whaaaaat</i>?!"

"I think you're hot," she shrugged. "I guess I have to own up to it now that I blurted it out."

He bit his lower lip, staring at her hand in consternation. "Uh, but, well - shit, Ches. Ya can't really think that?"

Elly sighed and reached out to touch his belly, trailing gentle fingertips ticklishly up and down the fine line of blond hairs rolling over it. He used to be able to see the hair vanish into his pants, but now all he could see was that bump of fat and her hand, dipping lower, circling his navel...

He gasped and flinched a little, jerking away at the intimate touch. "Whoa-whoa-whoa-<i>whoa</i>!"

She immediately snatched her hand back, face flaming with embarrassment. "Oh my god, I'm so sorry. I just assaulted you, I don't know why I thought that was okay. Please don't hate me."

Hizashi gaped at her, his golden eyes wide. 

She squeezed her eyes tight and jumped to her feet, bowing low in apology. "Sorry," she repeated. "I'm w - worse than horrible. That was uncalled for and I'll leave -"

"Nuh uh," he choked, grasping her hand as she turned away. "Don't go!"

"You don't hate me?"

"I mean, uh, a little warning woulda been nice! Ya startled me, babe. But I, um... I like your hands on me."

Her smile was radiant. "We need to start way slower than that, though. Here." She settled back on the bed and gestured for him to come close. "Lay your head against me, okay?"

Elly ran her hands gently through his long hair while he rested and stroked his forehead and cheeks. As he grew more relaxed she massaged his shoulders, easing the strain of the day away until Hizashi was humming with pleasure, his quirk vibrating in the air between them.

Eventually he raised his head, eyes glazed, and tugged on her shirt to indicate he wanted her to bend down. When she did he caught her lips with his in a serious kiss that took her breath away.

"<i>Hizashi</i>," she gasped.

"Ohhhhh," he whined softly. "Woooowwww."

"Yeah." 

"You sound happy. But what if..." He fidgeted, pressing his fingers together and trailing off shyly.

"What if, what?"

He sighed. "What if it keeps going? What if I get even bigger an' I can't stop it?"

"You're not going to die," she said firmly.

"No-o-o-o, but..."

"Zashi?"

"What if I look really-really different," he blurted out all at once. "Like, I get so big that I change?"

"Hizashi, I'm in love with <i>you</i>. Not your weight. Yeah, I think you're sexy as hell now, but as long as you're you, nothing else matters."

"You'd want me even then?"

Elly kissed him softly. "Yes. I'll always love you."

"<i>Oh</i>," he whispered, eyes widening as they grew shiny from unshed tears. "Can we - do you wanna, maybe..?"

"We can, and I very much do." She paused. "I - I really want - oh, geez, how the hell do I say this?"

"I love you, baby."

"That," Elly gasped, tears budding in the corners of her eyes. "I needed <i>that</i>. Oh, thank god. I love you, Zashi. Now make love to me."

"<i>Yeah</i>!"

The problem was his proportions were off. After several misses Hizashi started to get upset.

"I know, it's okay," she murmured. "I'll help."

He tried again but once he found her warmth there was another issue.

"It's gettin' in the <i>way</i>," he panted, frustrated. 

"No, sweetie, it's okay. Look." She raised her hips and he sank further in with a gasp. 

"Oh, <i>baby</i>!"

"That's good," she agreed with a moan. "That's so good."

"K - keep your legs like that," he groaned as he thrust. "That's perfect."

"I <i>know</i>," she agreed dreamily. "Don't stop sweetie, I'm close!"

He grunted with effort and kept going until she buried her face in the crook of his neck to muffle a scream. Proud of himself for making her feel good, he kissed her sweaty brow before continuing.

Elly took a minute to recover from her orgasm. Dazed and happy, she wanted to help him along so she did something she'd read about a few times. Threading her fingers through his long hair, she got close to the scalp before carefully grasping and tugging. 

Hizashi pulled up sharply, his mouth open in a loud gasp. "Whoa, <i>babe</i>!"

"Did I hurt you? I thought it might feel good."

"N - no, it wasn't painful. I think... do it again?" He bounced experimentally a few times. She waited until his eyes started to slip closed in bliss before pulling again. 

His reaction was electric.

"I'm gonna come, I'm gonna come <i>I'm gonna come</i>," he whined, his voice rising an octave each time with pleasure. 

"Awesome," she panted, holding tightly on to his shoulders while he thrust into her so her deeply she was pushed into the mattress. "Guess that did feel good!"

It took him a little while to come down from his high but when he did he carefully pulled out of her body. "Y - yeah." Hizashi exhaled softly against her sweaty neck, rolling over beside her. "Well, babe, some things can hurt in a good way."

"Mm hmm."

"But not for you, not right now. <i>You</i> get nothin' but sweet, sweet love and cuddles." He nuzzled her cheek with his nose and she giggled. "Yer in for a helluva surprise when I'm back to my normal self again, by the way," he promised with a mischevious twinkle in his eye. "I'm so much more agile when I'm fit."