There's only two reason a human would take stray yukkuri. First is for abyuse, the other is just momentary interest. It's hard to belief someone would take stray as pet because they're dirty and mostly scum.
Mister is troubled. The park's yukkuri clan has entrusted him this baby Byakuren. Problem is, his knowledge is limited to the type's name, favourite and hated thing. That's not enough to raise a pet yukkuri.
But feeling responsibility, he searched the internet for information, even to the Factory's site.
His first lesson about taking stray as pet is to bring the yukkuri to hospital, for sanitation check and detox.
There's one Factory affiliated yukuri hospital 10 minutes of walk from his place.
At first, he's not sure because the place looks just like human's clinic. But seeing a stray family crying in front of the door with their mold infested KoReimu (from what's left of the accessories still visible), he believed the sign.
He can't get in because he doesn't want those stray to run into the hospital and cause trouble.
They saw him and left their child in front of the door to demand that shitty human slave to open the door for them. That's when an old man open the door (accidentally smearing the mold covered KoReimu) angrily. He kicked the angry parents to a beautiful parabolic arch and dispose them into the yukkuri trash bin.
There's no other patient in the hospital, so the old man, doctor, can check his next patient immedieatly.
First, he asked the man what he gave to the baby, is it Ramune ?
Mister can't answer because he doesn't know. He told the doctor how he got Byakuren and the doctor snapped his pen to his hand. The sound shocked and awakened Byakuren who's put to sleep with Udonge's ability.
Mister told Byakuren that now she's in hospital. The Doctor checked Byakuren, all healthy without even smear of oil. A cleaning and detox would be enough. He told Byakuren that this Mister will take her as pet.
Byakuren freezes in shock, where she's taken by the nurse to be cleaned.
The Doctor confirmed again, so Mister will really take Byakuren as his pet, right ?
Since he agreed, the Doctor presented a lot of paperworks to fill. Those are contracts and pet owner registration.
He understand about pet yukkuri and badge system, but never expected so many paperworks included. One of the agreement is about abandoning yukkuri. Abandoned pet yukkuri often cause trouble to the society, so it's best to kill the pet or send them to the Factory. Even so, many peoples still failed to do so.
Another in the agreement is like having any other pets, the owner must take responsibility for what their pets do.
Mister read all the paperworks before signing it. The Doctor praised him for that and told him Byakuren would be alright being his pet. There are many peoples who just sign without even reading and in the end they throw away their pets.
Because Mister never has any yukkuri before, he also offered pet yukkuri products; after all, they're affiliated with the Factory so the quality is assured, or so the smiling Doctor told Mister.
Since he had a lot of time, the Doctor decided to give Mister a long lecture about the most basic of raising pet yukkuri.
Hospital is not really needed. As long as you let them take it easy, yukkuri won't get ill. If they're hurt, orange juice is enough. Peoples only came to hospital for routine check up.
The nurse returned with Byakuren. Her white skin now shows clearly after the dust are cleaned. the brown and purple gradated hair also shines unlike when she's still a stray.
The baby Byakuren is still freezed in shock though.
Finally, the Doctor handed Mister a small basket for carrying baby yukkuri. The inside is lined with soft mat so the fragile baby yukkuri won't be hurt. It can also be used for bed.
The final cost, one Yukichi and three Noguchi.
Mister leave the hospital with Byakuren in one hand and the heavy pet yukkuri goods in the other hand.
On their way, Byakuren asked why Mister would take her as pet. She's uneasy and thus won't be able to let Mister take it easy.
Mister thought, a big problem from yukkuri is their sense of value. Yukkuri are selfish creature who think as long as they're easy, the whole world will be easy too. Even pet yukkuri trained since they're baby would still get this feeling and look down on others.
Those who are not like this are the smart rare types or pet yukkuri with vigorous education since they're still babies. In rare case, there's also yukkuri who's abused by their parents, and thus destroying their sense of self-importance.
Thanks to the scum parents, Byakuren who lived in normal yukkuri clan with scum parents can have a personality to think about others.
To ease Byakuren's worries, Mister told her that even the Buddha trained himself before reaching enlightement. If she can't make him easy, then train herself to be able to do so.
He heard from the Doctor that Byakuren types are interested in Buddhist things. He's using that to make Byakuren more optimistic of her life, so surely the Buddha won't be angry to him, right ?
While Byakuren is thinking, Mister finally reached his room and put Byakuren down. From today, they will live together.