That night, Charcoal Seller, Tanjiro, and the others warmly invited Xia Xi to stay over.
The children were absolutely delighted, each scrambling to offer him their bedding.
In the end, Kie laughed and shooed them all back to their own rooms.
The next day, Xia Xi made time to give Tanjuro another checkup.
After checking carefully, he confirmed that his Kamado friend really had not been secretly practicing Sun Breathing at high intensity.
He had also been practicing the health-promoting Virility Sun Breathing that Xia Xi had tailored for him.
Combined with the medicine formula and a restrained lifestyle,
his health had clearly begun to improve.
At least for the next few years, there was no need to worry that he might suddenly drop dead without warning.
When Xia Xi was about to leave, he made a point of speaking to Kie again.
He said he wanted to take Tanjuro out for a trip.
They might be away for a while.
One reason was that, seeing how much Tanjuro had recovered, it was time to arrange the advanced treatment he had promised him.
He would take him to a large hospital owned by the Ubuyashiki in Tokyo for a lung lavage.
Aside from that,
Xia Xi also wanted to bring Tanjuro to Tamayo.
He wanted that lady to study this married man thoroughly.
After all...
This unassuming-looking Charcoal Seller
was the only living warrior with a Demon Slayer Mark since Yoriichi Tsugikuni.
His mark was congenital, too, and he could use Sun Breathing.
Xia Xi felt that, in a certain sense, this man was even more valuable for research than those Lower Ranks, or even the Upper Ranks.
Especially that dormant congenital Demon Slayer Mark on Tanjuro.
Every time the two met,
the System would display a prompt asking whether