Balin may have been psyched about going back to his school in the living world, with the assist of Loona's copy of the Grimoire from Stolas. But right now though, back at her apartment, they changed into their new swimwear for a pool party with the I.M.P crew.
In the bathroom, while Balin was changing into his swim-shirt, Loona walked in with a bottle of sunscreen.
Her swimwear was just a plan two-part bikini, which didn't cover most of the... unmentionables, but to her, it seemed better than a bra. Her soft fur was like a dress for dogs or hellhounds.
"Wow, Loona. You look very pretty." smiled Balin.
"Oh, Meal." she knelt down to the boy and hugged him with her tail wagging. She was starting to get used to these warm embraces and kind-hearted compliments "So sweet of you."
As Balin stroked her fur in the hug, he soon felt Loona rubbing his back with some sunscreen.
"Okay, hold still..." she said in concentration. "Just gotta lather some of this onto you..."
"Can you get sunburn in Hell?" Balin asked in surprise,
"Oh yeah." replied Loona. "One time, it was so hurt, this cowlick of fur on my leg caught on fire. Word of advice: Never let Blitzø check the weather app."
Balin then showed a mind-blown expression that made Loona laugh, before continuing to rub her sticky paw along his body, making Balin flustered the whole time. Seeing him melted by her touch, Loona then booped his nose with a little dab, making him laugh too.
"Ooh, someone enjoying this?" she sang with a smirk.
"Yes I am." the boy replied happily. "It's like you're my step-mommy."
Loona then laughed a little louder at his statement and gave him a soft kiss on his cheek with her warm lips. Doing that, she licked the sunblock off her maw and continued rubbing it on his neck.
"OK then... all done." she smiled, patting his back. "You ready for a little skinny-dipping?"
"Mm-hmm." Balin nodded his head once with excitement, but stooped to ask her something a little... sheepish. "Loona? Is the pool... made out of blood?"
"What? No, of course not, buddy. What would make you think that?" Loona replied with little concern, then snapped her fingers having forgot that this was Hell for a second. "...Oh yeah. Well, I am a demon taking care of you, a sweet human child, so anything can happen."
"Okay...?" sighed the kid sheepishly again.
"Don't worry Meal." she kept her warm smile for him. "The pool's really nice, especially this time of year. And you look adorable in your swimmers."
Balin really felt moved by those words, looking down at his gear. His swim-shirt was blue with a grey stingray covered in yellow spots that looked like shining stars splashing out of the water, while his trunks were just plain black.
With a smirk though, Loona soon got on all fours and trotted in between Balin's legs while they were open. Before he knew it, the boy was sitting on Loona's strong but fluffy back.
"Loona?" Balin was very surprised by this move.
"Oh? What's this?" she teased him. "You want a hellhound back ride? Hehehehehe. As you wish."
Loona began crawling around the living room in two circles with a giggling Balin on her back like a horse, until she walked over to the door to let him open and close it as they left.
"Hang on tight, kid." she smirked, extending her back. "You might wanna hang on to this babies."
As Balin gently grabbed onto her breasts, Loona started sprinting off on all fours, out of the apartment and all the way across the streets of Imp City to the pool.

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Helluva Boss: ''Helluva Human Kid''
FanfictionINSPIRED BY THE 'LOONA THE CARETAKER' SERIES by METALBRONY823: When the Immediate Murder Professionals (I.M.P) are called in to kill a target from Hell, Loona the hellhound finds a lost human boy snooping on them. Suddenly guilty of harming him, she...