Are you kidding me, even if someone doesn't have much of medical knowledge, they should know the danger of eating in such an environment. Doesn't it bother them a bit. 

Well, In the past, Vikings who are stereotypically portrayed as dirty people were actually the total opposites, they are described as clean freak by those around them during that time, as they practice good hygiene and would take bath once a week, something that's consider dangerous at that time as they believe prolonged contact with water will cause such harm to body. Then, there's the Arab who travel to Europe long back, who emphasize the concept of cleanliness and from there, they formed the basis of medical knowledge on earth modern era. But this situation right now, just a glance and I could tell why the endemic have been spreading like wildfire every year

"What's wrong Ash?" [Syah]

"What's wrong you say? Everything! [Ash]

"!?" [Mimi]

"First, just how in Goddess Achalasia name can you eat right now when, sorry for being blunt here, when this place reeks with fecal matter! No wonder Borg and Lin contract the disease!" [Ash]

"What!?" [Ray]

"Seriously..." [Mile]

"So, do me a favour will you?" [Ash]

"Do what?" [Kat]

"If you want your parents to be healthy, clean this place up! I'll do something about your parents" [Ash]

"You promise?" [Blanc]

"I'll try my best" [Ash]

There's no going back now when I have said that. Looks, the six of them started to take all necessary tools to cleanse the house, and as for the water.

"We have to use this water?" [Syah]

"Yes, and I'll constantly supply the water through my magic" [Ash]

"Well, if you insist, your mana pool is enormous to begin with" [Mimi]

"Glad you understand" [Ash]

I just make three large buckets and fill it with water with my water magic. Then, they're to dispose of the water somewhere far once they used it, preferably the toilet outside and come back afterwards. Before they can enter the house once again, I'll ask Rean and the other to inspect them, and in case they come back dirty, Charlotte will shower them with her water magic. This might be overkill, but who cares.

Now, to make some ORS (oral rehydration solutions), and...

(Let me do it, Ash) [Maria]

(But how?) [Ash]

(Release me) [Maria]

(Again, how... the Scythe!) [Ash]

As I begin to touch the scythe, I can feel something, something entering my body and

(Mom!) [Ash]

But, she doesn't reply. Far from it, she looks serious. Her long red hair and green eyes, I can't help but to call her multiple times, until

(Thank you Ash, but your power are still lacking, so let us focus treating your friends first) [Maria]

(Ye, yes!) [Ash]

It sucks, but I am happy to be able to see her, plus I can just consider this mother and son bonding time.

Mom quickly put around 1 litre of boiled water (we just boil it with our fire magic), then put 6 teaspoons of sugar and half teaspoon of salt and quickly dissolved it. She tells me that since Borg and Lin's are seriously dehydrated from constant diarrhoea, we should treat their hydration status first. 

"Ash?" [Borg]

"Somehow, somehow you're different" [Lin]

"Is that so? I would love to chat with you more, but please drink this first, it will hydrate you better as compared to plain water" [Ash?]

"Yes..." [Lin]

(Is that, really Ash?) [Syah]

(I don't know, he's somewhat different? Like he suddenly became a lot softer?) [Mimi]

They slowly gulp down the water.

"Thank you" [Borg]

"You're welcome, and please eat some of this chicken soup, they're properly cooked, plus this should give you more energy and help you heal faster" [Ash?]

"Su, sure" [Lin]

And there they go, taking the chicken soup and eating it.

"Brother Ash, can you please fill this bucket once again" [Blanc]

"Sure Blanc, and thank you for working hard, I promise you I'll treat your parents with utmost care" [Ash?]

"Ok!" [Blanc]

And while we are waiting for them to eat, mom explain to me what she will do

(Ash, this time I'll use my scan magic and see which organism is responsible for causing the endemic. So, once they done eating, we will scan their whole body, emphasizing the intestinal tract and see for other causative agent) [Maria]

(Sure... wait, what do you mean your scan magic?) [Ash]

(If I'm not mistaken, Goddess Achalasia did ask you to find out about this world. Please do your homework properly) [Maria]

(That doesn't even make any sense!) [Ash]

(Oh look, they've finish, let us continue) [Maria]

(Yes!) [Ash]

Borg and Lin gave put the bowl just beside them, to which I simply store inside my item box. Have to properly cleanse it afterwards

"Both of you, did you feel better?" [Ash?]

"We are!" [Borg]

"Thank you, Ash!" [Lin]

"That's good to hear, please continue to drink those water until you're completely cure" [Ash?]

And now, time to examine them

"Please, allow me to scan your entire body with my magic, particularly around your abdomen. I have to do this as to identify the causative agent responsible for your illness, and thus, treating you better" [Ash?]

"Yes, please do so" [Borg]

"If that help, then we don't mind" [Lin]

(Mom, that was quick) [Ash]

(Well, I have been building rapport with them since starting the treatment) [Maria]

And with that, mom channel her mana into my body, somehow, it's quite different. I can't properly explain this, but her mana, it's like transcended? A higher form of mana is the best description that I can use right now.

(Finish) [Maria]

(That was quick!) [Ash]

(Practice make perfect) [Maria]

"Such warm mana" [Lin]

"It feel, soothing" [Borg]

"Why thank you. Please hold on for a while, I have identified the agent responsible for it, so I'll use my  cure magic to destroy it" [Ash?]

"You can use that?" [Borg]

"Please do so!" [Lin]

(Ash, remember how I do it. You'll have to teach the others afterward) [Maria]

(Yes!) [Ash]

Others? Who? Oh well, let just do it as mom told me. 

Moms cure magic, it's phenomenal. Cure magic is a step above healing magic, I can use it of course but mom's cure magic, it's like a work of art. She explained to me how her cure magic are use to treat the patient, the amount of mana needed to be spent, where, when to start, when to stop, what should I do if the organism is different. And by the time she finished telling me all that

"There you go. I have eliminated the responsible agent, so please get yourself some good rest. Hydrate yourself properly with those water or soup like food. I'll come back tomorrow to see your condition along with some yogurt to help your gut immunity, and should your fever rise once again, please tell me, I'll see it" [Ash?]

"Thank, thank you Ash!" [Borg]

"Borg, Lin, are you guys? Really cure?" [Syah]

"It, it doesn't hurt anymore. Plus, that cure magic revitalize me back!" [Lin]

""""Mom! Dad!"""" [Ray, Mile, Kat, Blanc]

And there they go, running and hugging their mother, I should do the same to mom

(How sweet, but my time here has run out) [Maria]

(...) [Ash]

(Ash, take care of those ten. You will face a lot of hardship in the future, but I know you can do it) [Maria]

(I, I will...) [Ash]

(Don't be like that, my soul is inside the scythe, who knew, with the power of God of Death, we might meet once again) [Maria]

(!) [Ash]

(Goodbye, take care of yourself and be a good big brother) [Maria]

A kiss to my forehead, it sure is warm

.

.

.

"Well, I don't want to disturb such lovely moments, so if you excuse me" [Ash]

"Su. sure..." [Syah]

((((((He's back!!!!!!)))))) [Syah, Mimi, Borg, Lin, Ray, Mile]

Oh, is it just me, or do the house looks cleaner right now. Good, it doesn't reek anymore

Plus, I should clean myself as well after this

"Everything fine?" [Elise]

"Yes it is!" [Ash]

"What did you do inside?" [Rean]

"Well, I cure them, with certain someone helps" [Ash]

"ehh!?" [Kids]

"Haha, I'm serious now. Plus, let just go home. You must be tired" [Ash]

They simply nodded, come on, at least give me a response

"You sure love to break our common sense" [Kara]

"Not the kind of response I want, but I'll take it" [Ash]

Let just go home

.

.

.

(Take care of them huh... I will) [Ash]